[Nek5000-users] Zero flux boundary conditions

[nek5000-users at lists.mcs.anl.gov]

You need two bcs - one for fluid and one for T.

For the flow, "SYM" will be stress free (u.nhat=0, du/dn=0)

               "W  " will be homogeneous Dirichlet (u=0)

For temperature, use  "I  " which is insulated (zero flux).

Paul



On Sat, 15 May 2010, nek5000-users at lists.mcs.anl.gov wrote:

> Dear Nek devs,
>
>    How does one put in zero-flux boundary conditions for temperature? The 
> nek wiki says that anything other than the primitive boundary conditions will 
> be taken as zero-flux but in the benard example, the "zero-flux" condition 
> for velocity was put in using the SYM boundary condition which is a primitive 
> boundary condition as shown in the nek wiki. Could you please clarify?
>
> Regards,
> Mani chandra
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