Convergence problem with tetrahedral grids

Mehrez · April 12, 2016, 11:52

Hi Foamers,

Just an update, my simulations are still unstable when I use tetrahedral meshes.
Using hex mesh seems to improve the stability but this kind of mesh is not easy to build when dealing with complex geometries.
Do you have an idea how can I run stable simulations using tet meshes with multiphaseEulerFoam ?

Thank you,

Mhrz

yaoyn · June 25, 2018, 10:00

Hi Mhrz,

Did you manage to find a solution? I'm facing same problem with reactingTwoPhaseEulerFoam. The problem is gone when I use hex mesh, so I'm pretty confident that my IC and BC are correct.

Thanks
Noah

Mehrez · June 25, 2018, 19:09

Just use hex meshes if possible. Otherwise, the problem is still there.
mhrz

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
convergence problem	commonyue	Main CFD Forum	1	December 1, 2009 03:54
Submerged fin, Convergence problem	supermouniette	FLUENT	10	July 6, 2009 10:47
Convergence of CFX field in FSI analysis	nasdak	CFX	2	June 29, 2009 01:17
convergence problem in comsol	anderson	COMSOL	0	February 24, 2008 16:54
CONVERGENCE PROBLEM - oil boiler	MM	FLUENT	1	February 15, 2007 05:24

April 12, 2016, 11:52		#21
Mehrez Member Sami Join Date: Nov 2012 Location: Cap Town, South Africa Posts: 87 Rep Power: 13	Hi Foamers, Just an update, my simulations are still unstable when I use tetrahedral meshes. Using hex mesh seems to improve the stability but this kind of mesh is not easy to build when dealing with complex geometries. Do you have an idea how can I run stable simulations using tet meshes with multiphaseEulerFoam ? Thank you, Mhrz

June 25, 2018, 10:00		#22
yaoyn New Member Noah Yao Join Date: Feb 2017 Posts: 13 Rep Power: 9	Hi Mhrz, Did you manage to find a solution? I'm facing same problem with reactingTwoPhaseEulerFoam. The problem is gone when I use hex mesh, so I'm pretty confident that my IC and BC are correct. Thanks Noah

June 25, 2018, 19:09		#23
Mehrez Member Sami Join Date: Nov 2012 Location: Cap Town, South Africa Posts: 87 Rep Power: 13	Just use hex meshes if possible. Otherwise, the problem is still there. mhrz