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Impose a boundary condition on an interface between a solid and a fluid

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Old   February 10, 2015, 13:37
Default Impose a boundary condition on an interface between a solid and a fluid
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ajdad
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I seek to impose a boundary condition on an interface between a solid and a fluid ???

plzzz help me
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Old   February 11, 2015, 04:09
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Cees Haringa
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I Guess a solid-fluid interface would simply be a wall? What is the problem with applying a boundary condition there?

Or are you using a solid zone and fluid zone? If so - why; why not just leave out the solid part, and make the interfaces walls?
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Old   February 11, 2015, 12:34
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thank you CeesH for your reply, I explain my problem:
I want to simulate a solar receiver. we have two coaxial tubes.
the inner tube of length = 3m, it is made of steel it has a thickness = 3mm and receives a solar flux = 8000 W.
the outer tube is made of glass.

==> Be simulated, the convective thermal exchanges between the internal tube and the area of the cavity ???
When I use ansys fluent, I find the problem of creating a shadow face of the outer face of the inner tube, which I must impose a condition (flux = 8000W) !!!

Is what I will impose the boundary condition on the outer surface of the tube or on shadow face ???
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