I want to apply heat flux and convection on the same area. But when i try to apply i am getting a WARNING message as "OVERRIDE". I have attached that warning message. Please help me out with this issue.
Thanks in advance
Hemnath
Hello,
For many practical situations, two types of boundary conditions are commonly used for the resolution of the heat diffusion equation. More specifically, for an external boundary S, conditions can be specified as prescribed temperature T=T0 and prescribed surface heat flux q.n=q0 (where n is the normal to the boundary surface). When you apply convection, you actually suppose the heat flux vector to take the following form:
q.n=h (T-T0)
where h is the film coefficient. The consequence is that you CANNOT impose both q.n=q0 and q.n=h (T-T0) at the same place. The FE solver does not understand how the heat flux vector should be defined !
Hi,
Ansys help says : "Thermal labels CONV and HFLUX are mutually exclusive."
You should use SURF151 or SURF152 elements for both convection and heat flux.
Thank you Charles and Jean for your valuable answers. I will try your idea Jean.
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