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Reverse Flow Problem. (Hull with a Bulbous Bow )Towing Tank simulation.

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Old   February 27, 2012, 22:56
Default Reverse Flow Problem. (Hull with a Bulbous Bow )Towing Tank simulation.
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Maher Sawaf
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Hi everyone ..

I am writing here after attempting desperately several times to resolve the reverse flow problem which appears after few iterations.... I set the initial conditions and the boundary conditions (velocity inlet, pressure outlet, symmetry and wall )..6DoF hull body ..VoF wave..multiphase mixture ..etc....everything seems correct but when I use a hull with a bulbous bow the simulation collapses cuz of a reverse flow !...dont understand why ? is it the meshing method !

for meshing i chose the models : Surface Remesher ..Trimmer .. Prism layer mesher..and applied volumetric control with Z axis anisotropic ..repeated the simulations with diff mesh qualities and still hit the same problem ....

any advice will be highly appreciated ..
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Old   February 29, 2012, 01:30
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I experiences the same problem after few iterations

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Old   March 13, 2012, 19:04
Default reverse flow fraction
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the boundary where reverse flow occurs should be provided with 1 for either fluid. suppose if you provide fraction 1 for water and 0 for air it will only allow water to come in through reverse flow.

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