[Nek5000-users] variable viscosity formulation

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

Hi Nek Forum,

     I am using a variable viscosity formulation for a Rayleigh-Benard
problem. I get the following error after some time :

ERROR:  Non-positive diffusivity (  -0.481    ) specified for field 1,
group 0 element

Please let me know what might be wrong.

Thank you
Swarandeep