What Is The Recommended Symbol For Volumetric Flow Rate? [closed]

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Learn more about Teams What is the recommended symbol for Volumetric flow rate? [closed] Ask Question Asked 9 years, 2 months ago Modified 9 years, 2 months ago Viewed 4k times 0 $\begingroup$ Closed. This question is off-topic. It is not currently accepting answers.

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I'm currently working on a paper with a mathematician. He always writes $\dot Q$ as well as $\dot V$ for volumetric flow rate and claims both are standard notations. Till now I always used $Q$ (without the dot) and $\dot V$. Without success I tried to find a reference that will suggest us one or the other. To my surprise I was unable to find it in the IUPAP recommendations also the Handbook of Chemistry and Physics doesn't include it.

The only reference towards $Q$ was in wikipedia - but that is no acceptable guideline to solve our conflict.

• soft-question
• terminology
• notation

Share Cite Improve this question Follow edited Sep 1, 2015 at 14:00 Qmechanic♦ 212k4848 gold badges583583 silver badges2.3k2.3k bronze badges asked Sep 1, 2015 at 13:21 bdecafbdecaf 10111 silver badge22 bronze badges $\endgroup$ 2

• 1 $\begingroup$ I'm voting to close this question as off-topic because of this meta post. $\endgroup$ – Qmechanic ♦ Commented Sep 1, 2015 at 14:01
• $\begingroup$ Just to be helpful -- might I suggest simply picking one, making sure you define it in the text and moving on? Surely there are bigger things to work on in the paper than this! (And it helps that either one would make sense, but either needs defined) $\endgroup$ – tpg2114 Commented Sep 1, 2015 at 14:20

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V may represent true mass flow, or the flow of density, rather than simply the flow of volume. Q may represent a flow of volume unadjusted for density. TSI toolmaking co. uses Q as "standard flow rate", but they make an instrument that converts Q to "VolumetricFlow" by applying a density correction. See the link for the formula.

Another example of this use of V is First-Sensor engineering Co., which uses the symbol V as a translation of volumetric flow at standard conditions to true mass flow.

However, these other sources use Q to represent volumetric flow, with no adjustment for density:

University of Idaho lecture notes use Q.

LMNO engineering consulting firm uses Q.

Flow Simulation Ltd., an engineering software consulting firm] uses Q in its online calculator.

FishXing, apparently a website dedicated to creating pathways for fish past dams, etc., uses Q.

The Engineering Toolbox, an online resource for engineers and other technical professionals, uses Q.

The Honeywell Co. uses Q.

The University of Minnesota online Atlas of Human Cardiac Anatomy uses Q.

It seems to me that V and Q may refer to mass flow and volume flow, respectively. But V also shows up as volume in certain contexts, so there may be no authoritative definition of these two symbols.

Share Cite Improve this answer Follow edited Sep 1, 2015 at 22:45 answered Sep 1, 2015 at 14:05 ErnieErnie 8,56811 gold badge1717 silver badges2828 bronze badges $\endgroup$ Add a comment |

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