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Will coefficient of discharge remain same when it is used for measuring either liquid or gas flow rate?

Engineering Asked by Shardul on January 14, 2021

I would like to measure air flow rate. I have a orificemeter but do not know its coeficient of discharge. Will the Cd remain same for both the liquid and gases or it will be different.?

2 Answers

The discharge coefficient is a function of many factors, therefore, it will not be the same for liquids and gases. The discharge coefficient is a ratio between the effective flow area and geometric flow area of an opening. The effective area changes based on fluid properties and compressibility effects. http://kb.eng-software.com/eskb/ask-an-engineer/theory-equations-and-calculated-results-questions/relationship-between-flow-coefficient-and-discharge-coefficient

Answered by mechcad on January 14, 2021

If you want to test, you can use this online FREE orifice plate calculator..

FREE Orifice Plate Calculator

Answered by Phil Runner on January 14, 2021

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