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Calculation of mass flow rate in OpenFOAM 2.0.1

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Old   February 23, 2012, 11:19
Default Calculation of mass flow rate in OpenFOAM 2.0.1
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Hello friends,
After looking around the forums and reading some posts, I am confused with the measurement of mass flow rate in Openfoam. I want to calculate the values of my inlet and outlet patches. Could anybody can show me the proper way in OpenFoam 2.0.1? I am sorry for taking your time with that simple question.

Kind regards
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Old   February 23, 2012, 11:37
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Here you go...
This is probably one of the easier ways to do so.
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Old   February 23, 2012, 11:45
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thank you for your reply I saw the post you send me. But still have a doubt are you talking about calcMassFlow utility? It seems to be it is valid for ver. 1.4
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Old   February 23, 2012, 11:46
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Aurelien Thinat
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You can just use the command "patchIntegrate phi patchname", can't you ?
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Old   February 23, 2012, 11:52
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Thank you it works!
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Old   February 29, 2012, 05:24
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Hi Aurelien,

I have used the "patchIntergrate phi Patchname" command. I want to calculate the mass flow at my oultet patch and also want to plot it over the time in paraview. I have two questions

1. Is the mass flow calculated by the patchIntergrate command stored somewhere?? or is just shown in the terminal.

2. Do you have an idea on plotting/viewing the mass flow at a particular patch in paraview?

Thank you in advance

Regards
Abhinay
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Old   February 29, 2012, 09:47
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Dear Abhinay,

I am interested in this feature, too.

Have you solved it, by chance?

If so, what have you done?

Thanks,

Samuele.
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Old   February 29, 2012, 12:22
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Hi Samuele,

unfortunately i have not found a solution although i did find an interesting discussion on the forum. I did try the way suggested here but have not quite understood the method. Still searching . Here is the link

http://www.cfd-online.com/Forums/ope...-paraview.html

Let me know if you figure it out.

Regards
Abhinay
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Old   May 15, 2012, 07:14
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Hi All,

You can save the data into a text file

use

patchIntegrate phi INLET >inletflow

This will create a file named "inletflow" in which the data will be saved at each timestep. Hope this helps
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Old   May 15, 2012, 07:34
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Hi all,

thanks for help.

Just a question: where should I insert the command
Code:
patchIntegrate phi INLET >inletflow
?
Should I insert it in a control-dict file or something like this?

Thanks a lot,

Samuele.
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Old   May 15, 2012, 07:43
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Hi Samuele,

Get inside the case folder using cd command in command prompt and then used the "patchIntegrate" command.

Note: if the case is a decomposed one, reconstruct it and then use this command

Regards
Kripal
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Old   May 13, 2014, 05:23
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hi all,

I am relatively new in OpenFOAM and with my observation i can say that patchIntegrate gives the integrated values, but what to do if somebody is interested in calculating the average values for the same

I tried using
Code:
patchAverage phi Inlet
but it doesn't works..

Thanks and Regards,
Adarsh
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Old   December 3, 2015, 16:21
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Hi everybody,

I meet a problem with calculating the mass flow rate. I would like to know if mass flow rate for an interior surface, instead of the boundary surfaces. Is this possible? My mesh is 3D and generated by ICEM. Actually I have made an interior surface there, but as you may know, for openfoam, this interior surface does not appear in the boundary list (constant/polymesh/boundary). So it seems that "patchIntegrate phi BC_name" doed not work for this. Anybody has some ideas for this? Thank you so much.

best regards,
OFFO
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Old   April 5, 2017, 05:48
Default MFR in interior surfaces
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Hi All,

I have to reopen this thread. I think its been 2 years since the last post. OPenfoam has developed more now. I would like to know if there is anyway to calculate mass flow rate in any of the interior surfaces ?

Regards,
Manoj
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Old   November 17, 2017, 12:14
Default MassFlowRate; Inlet and Oulet Patch
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Shafik Walakaka
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Hi guys,

I am also needing to calculate the mass flow rate at the inlet and outlet to ensure that the mass is conserved.

Is there a way to do it on Openfoam4?

Regards
Shaq
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Old   November 21, 2017, 11:18
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Have you guys tried flowRateInletVelocity? I found this BC on https://www.openfoam.com/documentati...conditions.php
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