calculate mass flow rate on face OpenFoam
 

Dear All,
could some please tell me how to calculate mass flow rate on face OpenFoam. I need it for a Presentation.

Thanks in advance,

Ronaldo

Hi ronaldo,

you can get the mass flux by volume flux * density.
The volume flux you can read out directly from the result directories (0.*). You just need to know the number of your expected face. But normally the mass flux is needed for a whole patch (to be independent from the cell resolution). In these cases you can use the function:

patchIntegrate phi <patchName> -case <caseName>

There are more functions which may provide you a more elegant way:
http://openfoamwiki.net/index.php/Co...unctionObjects

Or if you got OF 1.6, you can simply use the mass flow functions :-))

Regards,
Robert

Thank you so much Robat,

I have tried, but it not works.This is the message
Table of functionObjects is empty

From function functionObject::New(const word& functionType, const Time&, const dictionary&)
in file db/functionObject/functionObject.C at line 75.

You can use calcMassFlow utility

http://openfoamwiki.net/index.php/Contrib_calcMassFlow

compatible with 1.6 or 1.7
 

Is this compatible with 1.6 or higher vesion?
I tried to compile with 1.6 and ended up with some errors.!

Regards
Raghu

it works on my 1.7.0 installation. Use the attached tar.gz : it contains a few modifications to make compatible with newer version

thanks.. It worked
 

Hi Emanuele,

Thanks for the attached file.. I was able to compile in OF 1.7

Regards
Raghu

Compiling Error of calcMassFlow utility
 

Hi Nuovodna,

I do not know whether you are still here or not. I tried to compile this utility but it shows the following error in OpenFOAM 3.0.1. Do you know the reason for that?

Anyone can help me if that is known to you. Thanks in advance.

Cheers
Razon