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Where are crosswind and streamline diffusion equations

Posted 11 set 2010, 21:18 GMT-4 1 Reply

John
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Hi, when I look at the equations for turbulent k.e. then I can see "helper" variables get defined for upwind diffusion, but I can't see them being used in any equation, nor can I see where the diffusion parameters are being used.

Well, actually, I *can* find them being used in the boundary conditions they get used to build boundary variables sigma_dg_ns and upwind_ns and then those get incorporated in the boundary.

But they don't seem to be in the body of the equations, which confuses me...

Any suggestions? Thanks, John
1 Reply Last Post 12 set 2010, 05:35 GMT-4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 12 set 2010, 05:35 GMT-4
HI

I have no idea, I would also have expected to see them in the domain definitions, puzzling ...

--
Good luck
Ivar
HI I have no idea, I would also have expected to see them in the domain definitions, puzzling ... -- Good luck Ivar

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