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Appropriate Boundary Conditions for This Problem?

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Old   January 31, 2022, 08:33
Arrow Appropriate Boundary Conditions for This Problem?
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In the picture below you see a steel sheet exiting a liquid zinc bath with a constant velocity of U.

The initial thickness of zinc on the steel plate is too much, so we use a solid barrier over the bath which controls and reduces the coating thickness.
I want to find the shear stress and pressure gradient distribution over the RED line.
I used the shown boundary conditions for the simulation in COMSOL.
Are the B.C(s) OK?
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boundary condition, comsol

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