covective boundary condition
Hi
What is convective boundary condition and how can i impose it? I am working on CFX 11. I am simulating a flow over an airfoil which must use covective boundary condition at the outlet. Thanks Mani |
Re: covective boundary condition
If I am not wrong, convective BC is the same as the Neumann BC... look for it in google... good luck...
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Re: covective boundary condition
I have no idea what Neumann BC is but i think know now what convective BC is! Its more like an outlet BC. It is used to prevent any sound reflection back in domain. Thanks for reply.
Regards Usman |
Re: covective boundary condition
In general the convective BC declares that heat flux normal to the boundary is given by this equation:
q_n = alpha (T_inf - T) q_n: heat flux normal to the boundary; alpha: heat transfer coefficient (maybe give, or you get it from Nusselt-Equations, or maybe it your task to calculate it ...); T_inf: Temperature of the farfield; T: Temperature at the boudary You wrote something about an outlet BC. An outlet BC must be a given velocity normal to the boundary. Like this: u*n_x+v*n_y = constant u: x-velocity; n_x: component of normal-vector in x-direction Correct me if I'm wrong. P.S. How can I do linebreak in this forum? |
Re: covective boundary condition
Why do you need to do line break in this forum. Are you working with LES sega.
Mani |
Re: covective boundary condition
What's LES?
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Re: covective boundary condition
Large Eddy Simulation is a superior technique to traditional RANS modelling. RANS modelling is crap, if you are still using it, give it up. LES is taking over!
Mani |
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