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Divergence using non reflecting boundary condition

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Old   November 26, 2020, 17:24
Default Divergence using non reflecting boundary condition
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Hi,

I am simulating acoustophoresis phenomena. To have propagation of acoustic waves in a fluid (water) I need compressibility so I enable compressible liquid treatment. The waves are generate by a piezoelectric trasducer.

The problem is that at the outlet (pressure outlet) there is a perturbation that propagates inside the channel, so I want to apply a non reflecting boundary condition, but when I select this option in the pressure outlet dialog box and i begin the analysis I have divergence problem.

I check the fluent guide and I don't find an incompatibility between the two conditions. Is there a problem of compatibility between the non reflecting condition and the compressibility liquid method?

Last edited by Luigi*; December 2, 2020 at 09:12.
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Old   November 30, 2020, 08:47
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Do you have any advice?
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compressible fluids, fsi, non reflecting boundary, pressure waves

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