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Cavitation Venturi strange alpha behaviour

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Old   October 26, 2021, 04:31
Exclamation Cavitation Venturi strange alpha behaviour
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nicola andreini
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Dear friends;
I am running simulations on a 2D rectangular venturi using interPhaseChangeFoam.
I am using kosst not using the wall functions but solving the whole boundary layer.
i got a strange behaviour of alpha that i can't correct, i would ask for help if someone had experience with it.
i attach some images and the setup i'm using.
thanks to all !

Attached Images
File Type: jpg alpha.jpg (23.7 KB, 7 views)
File Type: jpg fvscheme.JPG (41.5 KB, 8 views)
File Type: jpg fvsol1.JPG (31.4 KB, 6 views)
File Type: jpg fvsol2.JPG (35.0 KB, 5 views)
File Type: jpg mesh.jpg (100.3 KB, 4 views)
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alpha, cavitation, interphasechangefoam, multiphase, venturi

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