[Nek5000-users] Freestream BC: Dirichlet/Neumann BC

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

Within certain limits, yes. You can check the "ON" or "on" boundary 
condition in Nek, which is a combination of specified total stress (the 
"o" part where captial O just means zero total stress) and "N" which 
means that the velocity tangential to the boundary can be specified. A 
bit more on how to use on can be found in this post:

https://lists.mcs.anl.gov/mailman/htdig/nek5000-users/2018-August/005569.html

Philipp

On 2018-08-29 17:03, nek5000-users at lists.mcs.anl.gov wrote:
> Dear Nek users,
> 
> I am wondering is there a way to assign the freestream BC as “U = 
> expression and dv/dy = expression” , instead of assigning U and V 
> directly? Could anyone please help me on this?
> 
> Thanks in advance
> 
> 
> 
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