Calculate Volume Flow Rate: Pressure & Speed

Thread starter onqun
Start date Jun 17, 2010
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Flow Flow rate Rate Volume Volume flow rate

AI Thread Summary

To calculate the volume flow rate in the given lab project, the relationship between pressure and speed can be established using Poiseuille's law, which describes laminar flow in tubes. The law indicates that the flow rate is directly proportional to the pressure difference and the fourth power of the radius of the tube, while inversely proportional to the fluid's viscosity and the length of the tube. Given the known parameters—tube radius, fluid density, and pressure—one can derive the flow speed. The formula can be applied to determine how pressure influences the flow rate in the tubes. Understanding these principles is essential for accurate calculations in fluid dynamics.

Jun 17, 2010

onqun

Hi there, I have a lab project. Part of the project is to calculate the volume flow rate, I have 2 tubes,radius' are known , density of the fluid is known and pressure is known. How can i relate the pressure to speed?

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Jun 17, 2010

Andy Resnick

Science Advisor

Education Advisor

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Poiseuille flow is a good place to start:

http://en.wikipedia.org/wiki/Poiseuille's_law

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