[ICEM] grid independence

sameep · May 30, 2020, 23:57

i am trying to solve a jet problem with k epsilon turbulence model and have made a mesh with y+ ranging from 20 to 90. i wanted to check the mesh for grid independence. do i refine the whole geometry and change my Y+ as well or
do i leave the same Y+ and refine everywhere else ? sorry

AlezXander · June 1, 2020, 06:23

I personally would fix the y+ value. If you are using wall functions you need a minimum y+ and refining the boundary layer below that value is not recommended. I would suggest also to read this document for guidelines about y+ values in Fluent.

May 30, 2020, 23:57	grid independence	#1
sameep New Member sameep shrestha Join Date: Dec 2019 Posts: 1 Rep Power: 0	i am trying to solve a jet problem with k epsilon turbulence model and have made a mesh with y+ ranging from 20 to 90. i wanted to check the mesh for grid independence. do i refine the whole geometry and change my Y+ as well or do i leave the same Y+ and refine everywhere else ? sorry

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June 1, 2020, 06:23		#2
AlezXander New Member Alex Join Date: Oct 2017 Posts: 12 Rep Power: 8	I personally would fix the y+ value. If you are using wall functions you need a minimum y+ and refining the boundary layer below that value is not recommended. I would suggest also to read this document for guidelines about y+ values in Fluent.