How to calculate mass flow at a certain

Kazik · April 14, 2023, 11:16

Hello everybody,

I am getting into OpenFoam and the case i am doing is a simple flow through a set of pipes as shown in the picture. My only patches are inlet, wall and outlet.
Is there a way of getting mass flow rate that goes through each of the parallel pipes as shown in the picture in OF or Paraview? I know that if i define each “outlets” of the parallel pipes i can calculate it myself in paraView and i also looked up some threads for this matter and some were suggesting using "calcMassFlow.zip". But the thread is 15 years old so i am not sure if its still viable for my version of OF (v2212).

Thank you for all the help.

Pappelau · April 19, 2023, 05:02

Hello Kazik,
what you are searching are Facezones !

just add with the help of topoSet a faceZone for each channel to do your massflow calculation on.

(ps: You can even define then during the meshing process ! )
greetings

Alczem · April 19, 2023, 05:03

Hey,

I would create faceZones (internal faces) during the meshing process for each of the 4 pipes. You could then use those with functions during the run.

Another tedious way would be to use Paraview to clip and separate each pipe and then slice them and use the integrate filter to compute the flowrates one by one.

There are probably more clever ways though

EDIT: Got beat to it ^^

olesen · April 19, 2023, 09:46

The fluxSummary function object?

April 19, 2023, 05:02		#2
Pappelau Member Lukas Join Date: Sep 2021 Posts: 36 Rep Power: 4	Hello Kazik, what you are searching are Facezones ! just add with the help of topoSet a faceZone for each channel to do your massflow calculation on. (ps: You can even define then during the meshing process ! ) greetings hogsonik and Alczem like this.

April 19, 2023, 05:03		#3
Alczem Senior Member Join Date: Dec 2021 Posts: 204 Rep Power: 5	Hey, I would create faceZones (internal faces) during the meshing process for each of the 4 pipes. You could then use those with functions during the run. Another tedious way would be to use Paraview to clip and separate each pipe and then slice them and use the integrate filter to compute the flowrates one by one. There are probably more clever ways though EDIT: Got beat to it ^^ hogsonik and Pappelau like this.

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April 19, 2023, 09:46		#4
olesen Senior Member Mark Olesen Join Date: Mar 2009 Location: https://olesenm.github.io/ Posts: 1,685 Rep Power: 40	The fluxSummary function object?