|July 2, 2013, 11:28||
Convergence issues with Shear thinning fluids
Join Date: Dec 2010
Posts: 5Rep Power: 8
I am trying to model solid suspension in non-newtonian systems in stirred tanks. I am using steady state simulations. Impeller motion is handled by MRF. I have a granular eulerian phase for the solid.
My issue is with the herschel-bulkley viscosity. When I added significant shear thinning properties, I get significant convergence issues. With a power law constant of .99, my residuals look fine, but when I lower it to .9, my residuals will spike up for a couple hundred iterations, then start to descend, then spike back up again. The phase and velocity distributions are terrible too.
Any Ideas what might cause this?
|convergence issues, herschel-bulkley, multiphase model, non newtonian|
|Thread||Thread Starter||Forum||Replies||Last Post|
|problem with Min/max rho||tH3f0rC3||OpenFOAM||7||February 23, 2013 06:37|
|Convergence issues with Porous interface||oj.bulmer||CFX||5||January 24, 2013 05:53|
|increasing mesh quality is leading to poor convergence||tippo||CFX||2||May 5, 2009 10:55|
|modeling of shear thinning||Dominik||Main CFD Forum||1||July 13, 2005 10:05|
|shear stress scalar definitions?||Novak Elliott||CFX||0||April 6, 2003 01:45|