Calculation of flow rate in Openfoam

Bharath Bhushan · May 2, 2017, 07:13

hello guys,

I am using OpenFoam-2.3.1, and I need to calculate the mass flow rate at inlet and outlet. Please can anybody explain how to do that and to insert the code in control dict.

Thank you
Bharadwaj

piu58 · May 2, 2017, 08:02

You may use the patchAverage or patchIntegrate post processing tools for that.

Bharath Bhushan · May 4, 2017, 05:25

Quote:

Originally Posted by piu58

You may use the patchAverage or patchIntegrate post processing tools for that.

thank you Uwe Pilz,

I have a doubt that the phi is volume flow rate right what we get in the time directories ?.

piu58 · May 4, 2017, 08:10

> phi is volume flow rate right what we get in the time directories ?.

I don't have much experience with compressible media. But you should get the velocity components and the mass density, from which you may calculate the mass flow rate.

ybapat · May 5, 2017, 01:52

Quote:

Originally Posted by Bharath Bhushan

thank you Uwe Pilz,

I have a doubt that the phi is volume flow rate right what we get in the time directories ?.

Hello,

It depends on which solver you are using. Check for dimensions of phi in the file.

Regards,
-Yogesh

May 2, 2017, 07:13	Calculation of flow rate in Openfoam	#1
Bharath Bhushan New Member Bharadwaj Bhushan Join Date: Mar 2017 Posts: 19 Rep Power: 9	hello guys, I am using OpenFoam-2.3.1, and I need to calculate the mass flow rate at inlet and outlet. Please can anybody explain how to do that and to insert the code in control dict. Thank you Bharadwaj

May 2, 2017, 08:02		#2
piu58 Senior Member Uwe Pilz Join Date: Feb 2017 Location: Leipzig, Germany Posts: 744 Rep Power: 15	You may use the patchAverage or patchIntegrate post processing tools for that. __________________ Uwe Pilz -- Die der Hauptbewegung überlagerte Schwankungsbewegung ist in ihren Einzelheiten so hoffnungslos kompliziert, daß ihre theoretische Berechnung aussichtslos erscheint. (Hermann Schlichting, 1950)

May 4, 2017, 08:10		#4
piu58 Senior Member Uwe Pilz Join Date: Feb 2017 Location: Leipzig, Germany Posts: 744 Rep Power: 15	> phi is volume flow rate right what we get in the time directories ?. I don't have much experience with compressible media. But you should get the velocity components and the mass density, from which you may calculate the mass flow rate. __________________ Uwe Pilz -- Die der Hauptbewegung überlagerte Schwankungsbewegung ist in ihren Einzelheiten so hoffnungslos kompliziert, daß ihre theoretische Berechnung aussichtslos erscheint. (Hermann Schlichting, 1950)

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