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time averaging lagrangian data from dsmcFoam

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Old   August 5, 2015, 10:16
Default time averaging lagrangian data from dsmcFoam
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Hello,

I'm currently investigating dsmcFoam (OF 2.3.0). I simulated the relaxation of argon gas to equilibrium. If I plot the number of particles vs. the particle velocity (see example picture below) to compare it with the Maxwell distribution, I find fluctuations between the time steps. This data is not time averaged.
Exists a tool to time average the lagrangian data in OpenFoam to minimize the statistical error? I couldn't find a possible utility in OpenFoam. Is there a way to do this in OpenFoam (on-the-fly or post-processing)?

Regards,
hester
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Old   June 7, 2017, 05:01
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Quote:
Originally Posted by hester View Post
Hello,

I'm currently investigating dsmcFoam (OF 2.3.0). I simulated the relaxation of argon gas to equilibrium. If I plot the number of particles vs. the particle velocity (see example picture below) to compare it with the Maxwell distribution, I find fluctuations between the time steps. This data is not time averaged.
Exists a tool to time average the lagrangian data in OpenFoam to minimize the statistical error? I couldn't find a possible utility in OpenFoam. Is there a way to do this in OpenFoam (on-the-fly or post-processing)?

Regards,
hester
Hello Hester,

I am also working on Euler-lagrangian simulations of particle laden flows.

I too need to get the time-averged velocities of Lagrangian particles.

Have you achieved that? If so, could you please let me know how to do that.

Thanks in advance!
Vidyadhar
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Old   June 7, 2017, 07:20
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Hello Vidyadhar,

I'm not able to help you since I never found a tool for time-averaging. Since I'm not working on this problem anymore I stopped looking for a solution.
If you develop a way to solve the problem please share it.

Regards,
hester
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