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Fluctuating pressure field

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Old   October 16, 2009, 09:47
Exclamation Fluctuating pressure field
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I am performing a two phase simulation with rasCavitatingFoam for a 'pie' shaped section of a cylinder. I have a few questions reagarding the fluctuating behaviour of the pressure field at the inlet.
  • Why do you think the pressure field is still fluctuating although the residuals look small enough?
  • Can this be overcome by using a non-reflective boundary condition at inlet? If so is it possible to implement the same with openfoam.
Suggestions are welcome.



p.s: The courant number used for the computuation is 0.2 and i have employed a k-omega+SST turbulence model.
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Old   February 8, 2011, 06:12
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Bertrand Delvaux
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Did you find any answer about a non-reflective boundary condition? Because I would be interested as well.


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cavitation, convergence, fluctuation

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