[Nek5000-users] Boundary condition on velocity

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

Hi, neks.

I am trying to simulate a 3d pipe, fluid flows along z. And I need an
inflow boundary condition on velocity on forming of cylinder.
How I can set a radial velocity in userbc (Vr = sqrt( vx**2+vy**2 ) ) ?
I need to set Vr and dVr/dr.

Thank you so mach

Vatslav
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