Wild pressure fluctuations with InterDyMFoam

wavytracy · October 29, 2009, 05:07

I'm looking at verification of OpenFOAM with the Kleefsman et al (2005) dambreak simulation but I'm getting wild pressure fluctuations near the obstacle (at positions P1 to P7 in Kleefsman). I will try to attach a plot for position P1.

I have adapted the interDyMFoam dambreak tutorial, using exactly the same fvSolution and fvSchemes files. I have also tried changing various parameters, including the div schemes with only partial success.

Can anyone help me with a recommendation for schemes, or other, that may resolve this problem please?

maysmech · April 29, 2011, 09:56

Hi,
I have this problem too.
My case is a cyclone with pisoFoam and Smagorinsky LES.
What can be the cause of this high fluctuation? This fluctuation is seen on both residuals and magnitude of P. i mean at one time step range of P is from 0 to 500 but at next time step it becomes from -800 to -100 and so on ...

Regards,

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April 29, 2011, 09:56		#2
maysmech Senior Member Join Date: Jan 2010 Posts: 347 Blog Entries: 2 Rep Power: 17	Hi, I have this problem too. My case is a cyclone with pisoFoam and Smagorinsky LES. What can be the cause of this high fluctuation? This fluctuation is seen on both residuals and magnitude of P. i mean at one time step range of P is from 0 to 500 but at next time step it becomes from -800 to -100 and so on ... Regards,