twoPhaseEulerFoam cell size

jagan1mohan · June 13, 2020, 10:22

Hello Team, I'm looking to compare twoPhaseEulerFoam (2PEF) and CFDEM setup via simulating minimum fluidization velocity. The particle diameter is 1.2 mm.

1. Are there any recommendations / suggestions for cell sizes?
2. Can we have a cell size less than diameter of particle size?

Thank you,
Jagan Mohan.

geth03 · June 16, 2020, 03:49

1. well, normally you should choose the cell size, so your result should not change with further refinement. mesh or grid independant so to say.

2. i ran multiphaseEulerFoam and had crashes when my cell size was 80% of my drop diameter or so.
i don't know if there is any restriction with regards to velocity, so i don't know if it is problematic if your fluid passes multiple cells within one timestep.

it would be nice if you could share your experience afterwards.

regards

June 13, 2020, 10:22	twoPhaseEulerFoam cell size	#1
jagan1mohan New Member Jagan Mohan Join Date: Dec 2019 Location: New York Posts: 27 Rep Power: 7	Hello Team, I'm looking to compare twoPhaseEulerFoam (2PEF) and CFDEM setup via simulating minimum fluidization velocity. The particle diameter is 1.2 mm. 1. Are there any recommendations / suggestions for cell sizes? 2. Can we have a cell size less than diameter of particle size? Thank you, Jagan Mohan.

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June 16, 2020, 03:49		#2
geth03 Senior Member Join Date: Dec 2019 Location: Cologne, Germany Posts: 369 Rep Power: 8	1. well, normally you should choose the cell size, so your result should not change with further refinement. mesh or grid independant so to say. 2. i ran multiphaseEulerFoam and had crashes when my cell size was 80% of my drop diameter or so. i don't know if there is any restriction with regards to velocity, so i don't know if it is problematic if your fluid passes multiple cells within one timestep. it would be nice if you could share your experience afterwards. regards