How to increase number of elements in a mesh by 1.5 times?

Aarib · March 8, 2020, 06:01

I am trying to test the effect of grid senstivity on Fluent. I have a .msh fluent 3D mesh file. I need to increase the number of elements in mesh by 1.5 times and then compute the solution and then decrease the number of elements 0.5 times and then compute the solution. I can't figure out any way to do this. Can someone pleaseeee help me

Gert-Jan · March 8, 2020, 07:06

You have to go back to the software package that generated the mesh.

Aarib · March 8, 2020, 07:14

I don't know which software generated the mesh. We are given .msh .cas and .dat files only

Gert-Jan · March 8, 2020, 07:20

Better ask for a geometry file and build something new from there.
Alternatively, you can try to import the mesh in ICEM. Delete the volume elements and build a coarse, medium and fine grid from the remaining surface elements.
Or try mesh adaption in Fluent. But that will only refine the mesh.

March 8, 2020, 06:01	How to increase number of elements in a mesh by 1.5 times?	#1
Aarib New Member Aarib Irfan Join Date: Mar 2020 Posts: 18 Rep Power: 6	I am trying to test the effect of grid senstivity on Fluent. I have a .msh fluent 3D mesh file. I need to increase the number of elements in mesh by 1.5 times and then compute the solution and then decrease the number of elements 0.5 times and then compute the solution. I can't figure out any way to do this. Can someone pleaseeee help me

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March 8, 2020, 07:06		#2
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,827 Rep Power: 27	You have to go back to the software package that generated the mesh.

March 8, 2020, 07:14		#3
Aarib New Member Aarib Irfan Join Date: Mar 2020 Posts: 18 Rep Power: 6	I don't know which software generated the mesh. We are given .msh .cas and .dat files only

March 8, 2020, 07:20		#4
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,827 Rep Power: 27	Better ask for a geometry file and build something new from there. Alternatively, you can try to import the mesh in ICEM. Delete the volume elements and build a coarse, medium and fine grid from the remaining surface elements. Or try mesh adaption in Fluent. But that will only refine the mesh.