[Nek5000-users] PN/PN and usrdiv

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

Hi,

since I switched the pressure scheme from P_N/P_N-2 to PN/PN, as 
recommended by an earlier email, I have divergence trouble (simulation 
crashes) at the outflow, were a stabilization technique as in examples 
"peris" and "jet" is in place (adding divergence via usrdiv).
I spent a long time trying to fix this (several test runs with increased 
outflow normal element length, increased divergence magnitude, mesh 
deformation to nozzle shape, which avoids crashing but has an adverse 
effect on the upstream flow,...) but I am becoming suspicious that 
usrdiv is just not used in PN/PN.
Is that true? If so, how to fix it?

Thanks,
Markus