[Nek5000-users] v17.0 vs v17.0.0.beta2 regarding Stress Formulation and Pn/Pn-2

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

Dear All,

I am using mixed 'W   ' and 'SYM' boundary conditions on a boundary that is
not aligned with x,y,z axes. (with IFSTRS=T)

When using the previous v17.0.0.beta2 version, I could use these mixed
boundary conditions with the Pn/Pn pressure formulation, giving a
continuous pressure field.

After upgrading to v17.0, I get a number of the following runtime errors
when using Pn/Pn:

---
Mixed B.C. on a side nonaligned with either the X,Y, or Z axis detected for
  Element           8    side           1
  Requires PN/PN-2 STRESS FORMULATION
---

Pn/Pn-2 runs, as expected. Granted that I have to use Pn/Pn-2 for mixed BC
when not aligned with an axis, the problem is that the pressure is
discontinuous, which is stated in the documentation for the Pn/Pn-2
formulation. This is evident when plotting the pressure in Visit. Is there
a way to obtain a smooth (correct?) pressure field when using Pn/Pn-2? Or
is there a way to use the Pn/Pn formulation with such boundary conditions?

Thank you,
Jean
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