Learning Forum

[MohamedRizk97]

Hi

I am trying to do a simulation for Solar trough using Ansys fluent

I have a parabolic trough that will be aluminum and contains the air domain in it around a copper  pipe which has a water passing through it

my problem in how to give a boundary conditions because I have two domains

see the photo

[peteroznewman]

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I think you have at least 4 domains.

• aluminium trough


• air in and around the trough


• copper pipe wall


• water in the copper pipe

Many solar water heaters have a clear glass plate on the top of the trough. That keeps the air trapped and would make this problem a bit simpler. Otherwise you have heated air leaving the trough.

[MohamedRizk97]

of course sir I presented the air in trough in the geometry

and aluminum trough, copper pipe and the water in pipe and glass plate with thickness 10 mm.

but I must give a boundary condition for the air and it appears in fluent as aluminum type

[MohamedRizk97]

what is I must study before doing this simulation I have some experience in cfd and it is my first step in radiation problems .and I searched about some tutorials about radiation and convection but I don't get the answer.

[Rob]

I can't see any shadow walls or non conformal interfaces: heat is not going to pass between zones. 

[shashidhar0605]

Did you figure out the boundary conditions required to solve this problem? I am also looking for the same problem. If you have solved the problem, can you share the case file for the parabolic trough?