Concentration of a mixture of three gases

HWilliams79 · February 5, 2022, 17:48

I am attempting to simulate a flow where three different gases enter a rectangular cell through separate inlets at different speeds and then mix as they move towards an outlet: specifically, I need tables of values for the concentration fields of each gas.

What is the easiest way to do this as it does not look like concentration is a scalar which STAR CCM+ already has built-in?

LuckyTran · February 5, 2022, 18:23

Use a multicomponent gas model and then there is a mass fraction and mole fraction. Both of these are technically concentration but mole fraction is what is colloquially known as concentration.

February 5, 2022, 17:48	Concentration of a mixture of three gases	#1
HWilliams79 New Member Hollis Williams Join Date: Jan 2022 Posts: 16 Rep Power: 4	I am attempting to simulate a flow where three different gases enter a rectangular cell through separate inlets at different speeds and then mix as they move towards an outlet: specifically, I need tables of values for the concentration fields of each gas. What is the easiest way to do this as it does not look like concentration is a scalar which STAR CCM+ already has built-in?

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February 5, 2022, 18:23		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,751 Rep Power: 66	Use a multicomponent gas model and then there is a mass fraction and mole fraction. Both of these are technically concentration but mole fraction is what is colloquially known as concentration.