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Different visualization between Fluent and ANSYS CDF post processing results

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Old   December 4, 2020, 13:38
Default Different visualization between Fluent and ANSYS CDF post processing results
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Gianmario Ledda
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Good morning to everyone,

I'm trying to model an underexpandend jet impinging a cylindrical obstacle in a square box that is reduced to 1/4 for symmetry.
I make my simulation with ANSYS Fluent and it reaches the convergence criteria. When I visualize the contour plot of the velocity the solution is consistent and I can see the formation of the Mach disk, as predicted by theoryvel_fluent.png.
Meanwhile, when I visualize the same contour plot in CFD post-processing result I obtain a wrong solution when it is possible to see a discontinuity in the velocity fieldvel_CFDpost.jpg.
I don't understand because I have this difference, someone can help me?
Thank you,

Gianmario
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Old   December 6, 2020, 23:30
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Alexander
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use the same range for both pictures
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Old   December 7, 2020, 04:23
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Gianmario Ledda
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Hi Alexander, thank you for your reply.
I try to use the same range, but the problem persists. Especially the discontinuities in the velocity flow filed shows in the CFD post-processing.
Thank you for your time!
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