[interFoam] Get flow rate of a specific phase

miotto · April 7, 2020, 19:17

Hi everyone,

How can I get the flow rate of a specific phase crossing a patch?
More specifically, I want to calculate the water flow rate going into an outlet.

Is it possible to do that without Swak4Foam?

I tried this:

Code:

postProcess -func "flowRatePatch(name=bottom)"

and this:

Code:

postProcess -func "patchIntegrate(name=bottom, phi)"

But they give me a total flux (both phases summed together), right?

Can I maybe improve these commands so that phi gets multiplied by alpha.water before the integration? Would that be physically correct?

geth03 · May 29, 2020, 05:02

absolutely you can do that, look at that:

https://cpp.openfoam.org/v4/classFoa...aceRegion.html

April 7, 2020, 19:17	[interFoam] Get flow rate of a specific phase	#1
miotto Member Gui Miotto Join Date: Feb 2020 Posts: 30 Rep Power: 6	Hi everyone, How can I get the flow rate of a specific phase crossing a patch? More specifically, I want to calculate the water flow rate going into an outlet. Is it possible to do that without Swak4Foam? I tried this: Code: postProcess -func "flowRatePatch(name=bottom)" and this: Code: postProcess -func "patchIntegrate(name=bottom, phi)" But they give me a total flux (both phases summed together), right? Can I maybe improve these commands so that phi gets multiplied by alpha.water before the integration? Would that be physically correct?

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May 29, 2020, 05:02		#2
geth03 Senior Member Join Date: Dec 2019 Location: Cologne, Germany Posts: 355 Rep Power: 8	absolutely you can do that, look at that: https://cpp.openfoam.org/v4/classFoa...aceRegion.html