[Nek5000-users] ffx ffy ffz in usr

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

Hi Philipp,

Yes, they are shear velocity and bulk velocity. Can I say if the ffx, ffy
or ffz equal to (u_t/u_b)^2, the flow is specified as a fixed pressure
gradient in the channel, and parameter(54) and para(55) in rea file are
fixed as 0. Otherwise, if the all ffx, ffy and ffz are 0, the flow is fixed
at flow rate rather than pressure gradient?

Cheers,

Zhai
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