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<h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Volumenstrom</span></h1>
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<div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="de" dir="ltr"><div class="mw-content-ltr mw-parser-output" lang="de" dir="ltr"><table class="wikitable infobox float-right" style="margin-top:0; width:350px;" id="Vorlage_Infobox_Physikalische_Größe" summary="Infobox Physikalische Größe">
<tbody><tr>
<th colspan="2" style="background:#ABCDEF; color:inherit;"><a href="Physikalische_Gr%C3%B6%C3%9Fe" title="Physikalische Größe">Physikalische Größe</a>
</th></tr>
<tr>
<td style="width:130px;">Name
</td>
<td><b>Volumenstrom (Durchfluss)</b>
</td></tr>
<tr>
<td><a href="Formelzeichen" title="Formelzeichen">Formelzeichen</a>
</td>
<td><i><span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle Q}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>Q</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle Q}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/8752c7023b4b3286800fe3238271bbca681219ed.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:1.838ex; height:2.509ex;" alt="{\displaystyle Q}" loading="lazy"></span></i>
</td></tr>
<tr>
<td colspan="2" style="margin:0; padding:0;">
<table class="wikitable" style="margin:-1px; width:350px;" summary="Einheitensysteme">
<tbody><tr>
<th><a href="Gr%C3%B6%C3%9Fensystem" title="Größensystem">Größen-</a> und<br><a href="Einheitensystem" title="Einheitensystem">Einheitensystem</a>
</th>
<th><a href="Ma%C3%9Feinheit" title="Maßeinheit">Einheit</a>
</th>
<th><a href="Dimension_(Gr%C3%B6%C3%9Fensystem)" title="Dimension (Größensystem)">Dimension</a>
</th></tr>
<tr>
<td><a href="Internationales_Einheitensystem" title="Internationales Einheitensystem">SI</a>
</td>
<td><a href="Meter" title="Meter">m</a><sup>3</sup>·<a href="Sekunde" title="Sekunde">s</a><sup>−1</sup>
</td>
<td><a href="L%C3%A4nge_(Physik)" title="Länge (Physik)">L<sup>3</sup></a>·<a href="Zeit" title="Zeit">T</a><sup>−1</sup>
</td></tr>
</tbody></table>
</td></tr>
<tr>
<td colspan="2"><i>Siehe auch:</i> <a href="Fluss_(Physik)" title="Fluss (Physik)">Fluss (Physik)</a>, <a href="Massenstrom" title="Massenstrom">Massenstrom</a>, <a href="Abfluss" title="Abfluss">Abfluss</a>
</td></tr></tbody></table>
<p>Der <b>Volumenstrom</b>, auch <b>Durchflussrate</b> oder <b>Durchflussmenge</b> ist eine <a href="Physikalische_Gr%C3%B6%C3%9Fe" title="Physikalische Größe">physikalische Größe</a> aus der <a href="Fluidmechanik" class="mw-redirect" title="Fluidmechanik">Fluidmechanik</a>. Sie gibt an, wie viel <a href="Volumen" title="Volumen">Volumen</a> eines <a href="Ausbreitungsmedium" title="Ausbreitungsmedium">Mediums</a> pro <a href="Zeitspanne" class="mw-redirect" title="Zeitspanne">Zeitspanne</a> durch einen festgelegten <a href="Querschnitt_(Mechanik)" title="Querschnitt (Mechanik)">Querschnitt</a> transportiert wird. Zumeist ist das Medium eine <a href="Fl%C3%BCssigkeit" title="Flüssigkeit">Flüssigkeit</a> oder ein <a href="Gas" title="Gas">Gas</a>. Die <a href="SI-Einheit" class="mw-redirect" title="SI-Einheit">SI-Einheit</a> des Volumenstroms ist m³/s, gebräuchlich sind je nach <a href="Gr%C3%B6%C3%9Fenordnung" title="Größenordnung">Größenordnung</a> des Volumenstroms auch viele andere Einheiten.
</p><p>Der Volumenstrom wird mittels <a href="Durchflussmesser" title="Durchflussmesser">Durchflussmessern</a> gemessen.
</p>
<dl><dd><span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle Q={\dot {V}}={\frac {\mathrm {d} V}{\mathrm {d} t}}}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>Q</mi>
<mo>=</mo>
<mrow class="MJX-TeXAtom-ORD">
<mrow class="MJX-TeXAtom-ORD">
<mover>
<mi>V</mi>
<mo>˙<!-- ˙ --></mo>
</mover>
</mrow>
</mrow>
<mo>=</mo>
<mrow class="MJX-TeXAtom-ORD">
<mfrac>
<mrow>
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">d</mi>
</mrow>
<mi>V</mi>
</mrow>
<mrow>
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">d</mi>
</mrow>
<mi>t</mi>
</mrow>
</mfrac>
</mrow>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle Q={\dot {V}}={\frac {\mathrm {d} V}{\mathrm {d} t}}}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/4844a303ffa3f6c505062e4863aeefa013e278de.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.005ex; width:13.738ex; height:5.509ex;" alt="{\displaystyle Q={\dot {V}}={\frac {\mathrm {d} V}{\mathrm {d} t}}}" loading="lazy"></span></dd></dl>
<p>mit
</p>
<dl><dd><span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle Q}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>Q</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle Q}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/8752c7023b4b3286800fe3238271bbca681219ed.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:1.838ex; height:2.509ex;" alt="{\displaystyle Q}" loading="lazy"></span>: Volumenstrom</dd>
<dd><span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle V}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>V</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle V}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/af0f6064540e84211d0ffe4dac72098adfa52845.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.787ex; height:2.176ex;" alt="{\displaystyle V}" loading="lazy"></span>: Volumen</dd>
<dd><span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle t}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>t</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle t}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/65658b7b223af9e1acc877d848888ecdb4466560.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:0.84ex; height:2.009ex;" alt="{\displaystyle t}" loading="lazy"></span>: Zeit</dd></dl>
<div class="mw-heading mw-heading2"><h2 id="Zusammenhang_mit_Strömungsgeschwindigkeit"><span id="Zusammenhang_mit_Str.C3.B6mungsgeschwindigkeit"></span>Zusammenhang mit Strömungsgeschwindigkeit</h2></div>
<p>Der Volumenstrom <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle Q}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>Q</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle Q}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/8752c7023b4b3286800fe3238271bbca681219ed.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:1.838ex; height:2.509ex;" alt="{\displaystyle Q}" loading="lazy"></span> hängt mit der mittleren <a href="Str%C3%B6mungsgeschwindigkeit" title="Strömungsgeschwindigkeit">Strömungsgeschwindigkeit</a> <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle v_{A}}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>v</mi>
<mrow class="MJX-TeXAtom-ORD">
<mi>A</mi>
</mrow>
</msub>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle v_{A}}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/0f585e9372b4451aa77b0b527ed67358ba23bb9b.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.592ex; height:2.009ex;" alt="{\displaystyle v_{A}}" loading="lazy"></span> durch die Querschnittsfläche <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle A}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>A</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle A}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/7daff47fa58cdfd29dc333def748ff5fa4c923e3.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.743ex; height:2.176ex;" alt="{\displaystyle A}" loading="lazy"></span> zusammen über die Beziehung:
</p>
<dl><dd><span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle Q=v_{A}\cdot A}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>Q</mi>
<mo>=</mo>
<msub>
<mi>v</mi>
<mrow class="MJX-TeXAtom-ORD">
<mi>A</mi>
</mrow>
</msub>
<mo>⋅<!-- ⋅ --></mo>
<mi>A</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle Q=v_{A}\cdot A}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/9f257625e72e4e583c5eb7e25ba4ef778044ee79.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:10.951ex; height:2.509ex;" alt="{\displaystyle Q=v_{A}\cdot A}" loading="lazy"></span></dd></dl>
<p>Mit dieser Formel lässt sich bei bekannter Querschnittsfläche (<a href="Rohrleitung" title="Rohrleitung">Rohre</a>, <a href="Kanal_(Wasserbau)" title="Kanal (Wasserbau)">Kanäle</a>) der Volumenstrom errechnen, wenn die Fließgeschwindigkeit am durchströmten Querschnitt bekannt ist.
</p><p>Die Strömungsgeschwindigkeit in einem Querschnitt ist im Allgemeinen nicht konstant über den Querschnitt (siehe Darstellung), für <a href="Laminare_Str%C3%B6mung" title="Laminare Strömung">laminare Strömung</a> ergibt sich die mittlere Strömungsgeschwindigkeit allgemein zu
</p>
<dl><dd><span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle v_{A}={\frac {1}{A}}\cdot \int _{A}v(y,z)\,\cdot \mathrm {d} A}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>v</mi>
<mrow class="MJX-TeXAtom-ORD">
<mi>A</mi>
</mrow>
</msub>
<mo>=</mo>
<mrow class="MJX-TeXAtom-ORD">
<mfrac>
<mn>1</mn>
<mi>A</mi>
</mfrac>
</mrow>
<mo>⋅<!-- ⋅ --></mo>
<msub>
<mo>∫<!-- ∫ --></mo>
<mrow class="MJX-TeXAtom-ORD">
<mi>A</mi>
</mrow>
</msub>
<mi>v</mi>
<mo stretchy="false">(</mo>
<mi>y</mi>
<mo>,</mo>
<mi>z</mi>
<mo stretchy="false">)</mo>
<mspace width="thinmathspace"></mspace>
<mo>⋅<!-- ⋅ --></mo>
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">d</mi>
</mrow>
<mi>A</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle v_{A}={\frac {1}{A}}\cdot \int _{A}v(y,z)\,\cdot \mathrm {d} A}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/10b1a76683e2e3fcee39e2727cae654e8b88d0bf.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:24.41ex; height:5.676ex;" alt="{\displaystyle v_{A}={\frac {1}{A}}\cdot \int _{A}v(y,z)\,\cdot \mathrm {d} A}" loading="lazy"></span></dd></dl>
<p>mit
</p>
<dl><dd><span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle v(y,z)}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>v</mi>
<mo stretchy="false">(</mo>
<mi>y</mi>
<mo>,</mo>
<mi>z</mi>
<mo stretchy="false">)</mo>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle v(y,z)}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/2f63ff335d44ef97d66943146738185e204350dc.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:6.214ex; height:2.843ex;" alt="{\displaystyle v(y,z)}" loading="lazy"></span>: Geschwindigkeit an der Stelle <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle (y,z)}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mo stretchy="false">(</mo>
<mi>y</mi>
<mo>,</mo>
<mi>z</mi>
<mo stretchy="false">)</mo>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle (y,z)}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/2b0f7a368a828b868ea909c570dbc238956c863a.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:5.087ex; height:2.843ex;" alt="{\displaystyle (y,z)}" loading="lazy"></span> des Querschnitts, mit Strömung in <span style="white-space:nowrap"><span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle x}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>x</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle x}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/87f9e315fd7e2ba406057a97300593c4802b53e4.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.33ex; height:1.676ex;" alt="{\displaystyle x}" loading="lazy"></span>-</span>Richtung.</dd></dl>
<div class="mw-heading mw-heading2"><h2 id="Kontinuitätsgesetz"><span id="Kontinuit.C3.A4tsgesetz"></span>Kontinuitätsgesetz</h2></div>
<p>Bei sich änderndem Querschnitt gilt für Strömungen <a href="Inkompressibles_Fluid" class="mw-redirect" title="Inkompressibles Fluid">inkompressibler</a> Fluide das <a href="Kontinuit%C3%A4tsgesetz" title="Kontinuitätsgesetz">Kontinuitätsgesetz</a>:
</p>
<dl><dd><span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle Q=A_{1}\cdot v_{1}=A_{2}\cdot v_{2}}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>Q</mi>
<mo>=</mo>
<msub>
<mi>A</mi>
<mrow class="MJX-TeXAtom-ORD">
<mn>1</mn>
</mrow>
</msub>
<mo>⋅<!-- ⋅ --></mo>
<msub>
<mi>v</mi>
<mrow class="MJX-TeXAtom-ORD">
<mn>1</mn>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>A</mi>
<mrow class="MJX-TeXAtom-ORD">
<mn>2</mn>
</mrow>
</msub>
<mo>⋅<!-- ⋅ --></mo>
<msub>
<mi>v</mi>
<mrow class="MJX-TeXAtom-ORD">
<mn>2</mn>
</mrow>
</msub>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle Q=A_{1}\cdot v_{1}=A_{2}\cdot v_{2}}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/f0496c2d2ff0b3f493300613e2b64bf53cd2820d.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:21.352ex; height:2.509ex;" alt="{\displaystyle Q=A_{1}\cdot v_{1}=A_{2}\cdot v_{2}}" loading="lazy"></span></dd></dl>
<p>Dabei ist <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle A_{1}}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>A</mi>
<mrow class="MJX-TeXAtom-ORD">
<mn>1</mn>
</mrow>
</msub>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle A_{1}}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/6bc2435b217c1a0f46f8a517ffa225c6f9440e81.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.797ex; height:2.509ex;" alt="{\displaystyle A_{1}}" loading="lazy"></span> der Querschnitt, durch den das Fluid mit einer mittleren Geschwindigkeit <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle v_{1}}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>v</mi>
<mrow class="MJX-TeXAtom-ORD">
<mn>1</mn>
</mrow>
</msub>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle v_{1}}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/98d33f5d498d528bd8c10edc8ac8c34347f32b3a.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.182ex; height:2.009ex;" alt="{\displaystyle v_{1}}" loading="lazy"></span> strömt. Ändert man den Querschnitt auf <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle A_{2}}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>A</mi>
<mrow class="MJX-TeXAtom-ORD">
<mn>2</mn>
</mrow>
</msub>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle A_{2}}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/3ec73b8bc9abc3efb934f5a6ec2803713771f4bc.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.797ex; height:2.509ex;" alt="{\displaystyle A_{2}}" loading="lazy"></span>, so ändert sich die mittlere Strömungsgeschwindigkeit auf <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle v_{2}}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>v</mi>
<mrow class="MJX-TeXAtom-ORD">
<mn>2</mn>
</mrow>
</msub>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle v_{2}}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/eb04c423c2cb809c30cac725befa14ffbf4c85f3.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.182ex; height:2.009ex;" alt="{\displaystyle v_{2}}" loading="lazy"></span>. Anders ausgedrückt: Für inkompressible Fluide ist der Volumenstrom eine <a href="Erhaltungsgr%C3%B6%C3%9Fe" class="mw-redirect" title="Erhaltungsgröße">Erhaltungsgröße</a> bei Querschnittsänderungen der Strömung.
</p><p>Flüssigkeiten sind in erster Näherung inkompressibel, d. h. ihre <a href="Dichte" title="Dichte">Dichte</a> ändert sich nicht, wenn man den Strömungsquerschnitt bei konstantem Volumenstrom aufweitet oder einschnürt (und somit den Druck ändert). Für Gase gilt dies dagegen nicht, da sie kompressibel sind.
</p>
<div class="mw-heading mw-heading2"><h2 id="Zusammenhang_mit_Massenstrom">Zusammenhang mit Massenstrom</h2></div>
<p>Der <a href="Massenstrom" title="Massenstrom">Massenstrom</a> <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle q_{m}}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>q</mi>
<mrow class="MJX-TeXAtom-ORD">
<mi>m</mi>
</mrow>
</msub>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle q_{m}}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/d7f3fc33576829e4effd50965fce16c1c18c1c5b.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.712ex; height:2.009ex;" alt="{\displaystyle q_{m}}" loading="lazy"></span> hängt über
</p>
<dl><dd><span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle q_{m}={\dot {m}}={\frac {\mathrm {d} m}{\mathrm {d} t}}=\rho \cdot {\dot {V}}=\rho \cdot Q}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>q</mi>
<mrow class="MJX-TeXAtom-ORD">
<mi>m</mi>
</mrow>
</msub>
<mo>=</mo>
<mrow class="MJX-TeXAtom-ORD">
<mrow class="MJX-TeXAtom-ORD">
<mover>
<mi>m</mi>
<mo>˙<!-- ˙ --></mo>
</mover>
</mrow>
</mrow>
<mo>=</mo>
<mrow class="MJX-TeXAtom-ORD">
<mfrac>
<mrow>
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">d</mi>
</mrow>
<mi>m</mi>
</mrow>
<mrow>
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">d</mi>
</mrow>
<mi>t</mi>
</mrow>
</mfrac>
</mrow>
<mo>=</mo>
<mi>ρ<!-- ρ --></mi>
<mo>⋅<!-- ⋅ --></mo>
<mrow class="MJX-TeXAtom-ORD">
<mrow class="MJX-TeXAtom-ORD">
<mover>
<mi>V</mi>
<mo>˙<!-- ˙ --></mo>
</mover>
</mrow>
</mrow>
<mo>=</mo>
<mi>ρ<!-- ρ --></mi>
<mo>⋅<!-- ⋅ --></mo>
<mi>Q</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle q_{m}={\dot {m}}={\frac {\mathrm {d} m}{\mathrm {d} t}}=\rho \cdot {\dot {V}}=\rho \cdot Q}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/3990b223f75df8d7bdd4ecc61fb40b7cf3e9ad85.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.005ex; width:30.703ex; height:5.509ex;" alt="{\displaystyle q_{m}={\dot {m}}={\frac {\mathrm {d} m}{\mathrm {d} t}}=\rho \cdot {\dot {V}}=\rho \cdot Q}" loading="lazy"></span></dd></dl>
<p>mit dem Volumenstrom <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle Q}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>Q</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle Q}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/8752c7023b4b3286800fe3238271bbca681219ed.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:1.838ex; height:2.509ex;" alt="{\displaystyle Q}" loading="lazy"></span> zusammen, falls die <a href="Dichte" title="Dichte">Dichte</a> <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \rho }">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>ρ<!-- ρ --></mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle \rho }</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/1f7d439671d1289b6a816e6af7a304be40608d64.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:1.202ex; height:2.176ex;" alt="{\displaystyle \rho }" loading="lazy"></span> über den Querschnitt konstant ist. Sonst muss dieses Produkt über den Querschnitt integriert werden.
</p>
<div class="mw-heading mw-heading2"><h2 id="Normvolumenstrom">Normvolumenstrom</h2></div>
<div class="sieheauch" role="navigation" style="font-style:italic;"><span class="sieheauch-text">Siehe auch</span>: <a href="Standard-Liter_pro_Minute" title="Standard-Liter pro Minute">Standard-Liter pro Minute</a></div>
<p>Das Volumen einer gegebenen <a href="Stoffmenge" title="Stoffmenge">Stoffmenge</a> Gas ist abhängig von <a href="Druck_(Physik)" title="Druck (Physik)">Druck</a> und <a href="Temperatur" title="Temperatur">Temperatur</a>. Da beide Größen in Rohrleitungsnetzen oder industriellen Prozessen nicht konstant sind, wird der Volumenstrom von Gasen oft als <i>Normvolumenstrom</i> angegeben. Dazu wird das in einer bestimmten Zeitspanne gemessene Volumen (<i>Betriebsvolumen</i>) auf ein <a href="Normvolumen" title="Normvolumen">Normvolumen</a> mit festgelegtem Druck und Temperatur umgerechnet. Es gilt<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>
</p>
<dl><dd><span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle Q_{\mathrm {N} }=Q\cdot {\frac {p\cdot T_{\mathrm {N} }}{p_{\mathrm {N} }\cdot T}}}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>Q</mi>
<mrow class="MJX-TeXAtom-ORD">
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">N</mi>
</mrow>
</mrow>
</msub>
<mo>=</mo>
<mi>Q</mi>
<mo>⋅<!-- ⋅ --></mo>
<mrow class="MJX-TeXAtom-ORD">
<mfrac>
<mrow>
<mi>p</mi>
<mo>⋅<!-- ⋅ --></mo>
<msub>
<mi>T</mi>
<mrow class="MJX-TeXAtom-ORD">
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">N</mi>
</mrow>
</mrow>
</msub>
</mrow>
<mrow>
<msub>
<mi>p</mi>
<mrow class="MJX-TeXAtom-ORD">
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">N</mi>
</mrow>
</mrow>
</msub>
<mo>⋅<!-- ⋅ --></mo>
<mi>T</mi>
</mrow>
</mfrac>
</mrow>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle Q_{\mathrm {N} }=Q\cdot {\frac {p\cdot T_{\mathrm {N} }}{p_{\mathrm {N} }\cdot T}}}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/7e1c6c4f4fdd20f35a82529e2b260930015fef92.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:16.705ex; height:5.843ex;" alt="{\displaystyle Q_{\mathrm {N} }=Q\cdot {\frac {p\cdot T_{\mathrm {N} }}{p_{\mathrm {N} }\cdot T}}}" loading="lazy"></span> ,</dd></dl>
<p>dabei sind <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle p}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>p</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle p}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/81eac1e205430d1f40810df36a0edffdc367af36.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; margin-left: -0.089ex; width:1.259ex; height:2.009ex;" alt="{\displaystyle p}" loading="lazy"></span> und <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>T</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle T}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/ec7200acd984a1d3a3d7dc455e262fbe54f7f6e0.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.636ex; height:2.176ex;" alt="{\displaystyle T}" loading="lazy"></span> tatsächlich vorherrschender Druck und Temperatur während der Betriebsvolumenmessung und <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle p_{\mathrm {N} }}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>p</mi>
<mrow class="MJX-TeXAtom-ORD">
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">N</mi>
</mrow>
</mrow>
</msub>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle p_{\mathrm {N} }}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/d4a1252cb2a6f3ff2f9594cffb7201fc46da45ac.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; margin-left: -0.089ex; width:2.724ex; height:2.009ex;" alt="{\displaystyle p_{\mathrm {N} }}" loading="lazy"></span> und <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T_{\mathrm {N} }}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>T</mi>
<mrow class="MJX-TeXAtom-ORD">
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">N</mi>
</mrow>
</mrow>
</msub>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle T_{\mathrm {N} }}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/4461972251842a5f6c5bc13a2b96f10459e65715.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.822ex; height:2.509ex;" alt="{\displaystyle T_{\mathrm {N} }}" loading="lazy"></span> Druck und Temperatur der <a href="Standardbedingungen" title="Standardbedingungen">Normbedingungen</a> (beispielsweise <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle p_{\mathrm {N} }=1{,}01325\,\mathrm {bar} }">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>p</mi>
<mrow class="MJX-TeXAtom-ORD">
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">N</mi>
</mrow>
</mrow>
</msub>
<mo>=</mo>
<mn>1,013</mn>
<mn>25</mn>
<mspace width="thinmathspace"></mspace>
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">b</mi>
<mi mathvariant="normal">a</mi>
<mi mathvariant="normal">r</mi>
</mrow>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle p_{\mathrm {N} }=1{,}01325\,\mathrm {bar} }</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/dd972c7b3ce32e29eea66e28489976b0aa0e0e90.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; margin-left: -0.089ex; width:17.197ex; height:2.509ex;" alt="{\displaystyle p_{\mathrm {N} }=1{,}01325\,\mathrm {bar} }" loading="lazy"></span> und <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T_{\mathrm {N} }=273{,}15\,\mathrm {K} }">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>T</mi>
<mrow class="MJX-TeXAtom-ORD">
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">N</mi>
</mrow>
</mrow>
</msub>
<mo>=</mo>
<mn>273</mn>
<mrow class="MJX-TeXAtom-ORD">
<mo>,</mo>
</mrow>
<mn>15</mn>
<mspace width="thinmathspace"></mspace>
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">K</mi>
</mrow>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle T_{\mathrm {N} }=273{,}15\,\mathrm {K} }</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/187a855bb76648aa4bfb2624122ec06a09b87d53.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:14.575ex; height:2.509ex;" alt="{\displaystyle T_{\mathrm {N} }=273{,}15\,\mathrm {K} }" loading="lazy"></span>, die Normbedingungen variieren weltweit und umfassen auch noch weitere Bedingungen wie <a href="Luftfeuchte" class="mw-redirect" title="Luftfeuchte">Luftfeuchte</a>). Hierbei müssen <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>T</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle T}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/ec7200acd984a1d3a3d7dc455e262fbe54f7f6e0.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.636ex; height:2.176ex;" alt="{\displaystyle T}" loading="lazy"></span> und <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T_{\mathrm {N} }}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<msub>
<mi>T</mi>
<mrow class="MJX-TeXAtom-ORD">
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">N</mi>
</mrow>
</mrow>
</msub>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle T_{\mathrm {N} }}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/4461972251842a5f6c5bc13a2b96f10459e65715.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.822ex; height:2.509ex;" alt="{\displaystyle T_{\mathrm {N} }}" loading="lazy"></span> als <a href="Absolute_Temperatur" class="mw-redirect" title="Absolute Temperatur">absolute Temperatur</a> verstanden werden. Diese hängt mit der Celsius-Temperatur <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle t}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>t</mi>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle t}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/65658b7b223af9e1acc877d848888ecdb4466560.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:0.84ex; height:2.009ex;" alt="{\displaystyle t}" loading="lazy"></span> wie folgt zusammen: <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T/\mathrm {K} =t/^{\circ }\mathrm {C} +273{,}15}">
<semantics>
<mrow class="MJX-TeXAtom-ORD">
<mstyle displaystyle="true" scriptlevel="0">
<mi>T</mi>
<mrow class="MJX-TeXAtom-ORD">
<mo>/</mo>
</mrow>
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">K</mi>
</mrow>
<mo>=</mo>
<mi>t</mi>
<msup>
<mrow class="MJX-TeXAtom-ORD">
<mo>/</mo>
</mrow>
<mrow class="MJX-TeXAtom-ORD">
<mo>∘<!-- ∘ --></mo>
</mrow>
</msup>
<mrow class="MJX-TeXAtom-ORD">
<mi mathvariant="normal">C</mi>
</mrow>
<mo>+</mo>
<mn>273</mn>
<mrow class="MJX-TeXAtom-ORD">
<mo>,</mo>
</mrow>
<mn>15</mn>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">{\displaystyle T/\mathrm {K} =t/^{\circ }\mathrm {C} +273{,}15}</annotation>
</semantics>
</math></span><img src="./_assets_/eb734a37dd21ce173a46342d1cc64c92/0004d0b1b0851b9abff8357fe68d1467db4e5b9e.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:21.739ex; height:3.009ex;" alt="{\displaystyle T/\mathrm {K} =t/^{\circ }\mathrm {C} +273{,}15}" loading="lazy"></span>.
</p>
<div class="mw-heading mw-heading2"><h2 id="Bezeichnungen">Bezeichnungen</h2></div>
<p>In manchen Bereichen der Naturwissenschaft und Technik werden Volumenströme kurz als <i>-fluss</i> bezeichnet, z. B. der <i><a href="Abfluss" title="Abfluss">Abfluss</a></i> in der <a href="Hydrologie" title="Hydrologie">Hydrologie</a>, vgl. <a href="Fluss_(Physik)" title="Fluss (Physik)">Fluss (Physik)</a>. In Technik und Wirtschaft kann auch ein Brennstoff<i>durchsatz</i>, eine Förder<i>menge</i>, eine Förder<i>leistung</i> oder das Saugvermögen einer Pumpe als Volumenstrom angegeben sein. In der Medizin spricht man analog vom <a href="Herzzeitvolumen" title="Herzzeitvolumen">Herzzeitvolumen</a> oder synonym vom <i>Herzminutenvolumen</i> mit der Einheit l/min.
</p>
<div class="mw-heading mw-heading2"><h2 id="Einzelnachweise">Einzelnachweise</h2></div>
<ol class="references">
<li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text">Horst-Walter Grollius: <cite style="font-style:italic">Grundlagen der Pneumatik</cite>. Carl Hanser Verlag GmbH Co KG, 2012, ISBN 978-3-446-43398-4, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>47</span>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rfr_id=info:sid/de.wikipedia.org:Volumenstrom&rft.au=Horst-Walter+Grollius&rft.btitle=Grundlagen+der+Pneumatik&rft.date=2012&rft.genre=book&rft.isbn=9783446433984&rft.pages=47&rft.pub=Carl+Hanser+Verlag+GmbH+Co+KG" style="display:none"> </span></span>
</li>
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Dieser Artikel wurde von <a class="external text" title="Zuletzt bearbeitet am 2025-09-29" href="https://de.wikipedia.org/wiki/?title=Volumenstrom&oldid=260177699">Wikipedia</a> herausgegeben. Der Text ist unter <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.de">Creative Commons Attribution-Share Alike 4.0</a> verfügbar, sofern nicht anders angegeben. Für die Mediendateien können zusätzliche Bedingungen gelten.
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