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-   -   Calculate mass flow (http://www.cfd-online.com/Forums/openfoam-paraview/61270-calculate-mass-flow.html)

aurore May 22, 2006 08:23

Hello, Has anybody calculat
 
Hello,

Has anybody calculated mass flow with Paraview ?
I don't know if it's possible but if somebody has an idea :-)

Thank you

theof May 22, 2006 08:35

Hi Aurore, You can calculate
 
Hi Aurore,
You can calculate the mass flow using the filter called Surface Flow.
theophane

aurore May 22, 2006 10:12

Hi Theophane, Thank you for
 
Hi Theophane,

Thank you for your response. I don't want to have mass flow for each cell : how can I have mass flow through boundary patches ?

Thank you

debris May 23, 2006 03:56

Hi Aurore, In order to calc
 
Hi Aurore,

In order to calculate mass flow through boundary patches you have to use "extract part" from the filter menu, then select the boundary patch you want. And then, use "Surface flow" on your extracted part.

aurore May 23, 2006 05:09

Hi Julien, Thank you for yo
 
Hi Julien,

Thank you for your answer because it works very well.

Aurore

tangd June 13, 2006 04:05

Hallo Aurore! Based on the is
 
Hallo Aurore!
Based on the issue discussed above. I'm wondering how the mass flow is computed. Since I have the equation to obtain mass flow rate:
mdot = (A * pt/sqrt[Tt]) * sqrt(gam/R) * M * [1 + .5 * (gam-1) * M^2 ]^-[(gam + 1)/(gam - 1)/2]
Where mdot is mass flow rate we want to achieve, Tt is the total temperature, pt is the total pressure, M is Mach number, gam is the specific heat ratio.
So I guess you have to define total temp and pressure somewhere in your preprocessing, am I right? So I want to know which solver did you use in FoamX? And how you defined pt, Tt boundary conditions? Thanks by the way!


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