[Nek5000-users] Dissipation rate

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

Hi, Nek users.

I am trying to calculate the dissaipation rate now. In my subroutine which
computes the derivatives I use following procedure for smoothing:

call col2    ( dui_dxj, bm1, ntot )
call dssum( dui_dxj, lx1, ly1, lz1 )
call col2    ( dui_dxj, binvm1, ntot )

and there are some unrealistic values on the surface between spectral
elements.

I set up also additional filtering of high modes of velocity with various
transfer functions, but it did not help.

Do you have any idea about the causes and how to fixed this ?

Regards, Vatslav
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