[ANSYS Meshing] Refine mesh with inflation

andreia_melo · November 7, 2018, 07:47

Hi,

I'm very new at fluent and doing a 2D simulation of a valveless pulsejet, a did the mesh with inflation in order to obtain a yplus between 30 to 300 but now i'm trying to do a study of mesh independence but it is not converging. The refinament option is not available so i'm decreasing the element size but i'm not changing the inflation, should i refine the inflation too? But how? Please help me

bpulat · November 7, 2018, 09:53

Hey Andreia,
- If your first yplus values are all in range, you shouldn't change the dimension of your first inflation layer in your mesh study.
- But if necessary you can work around the total number of inflation layers.
- To refine or to coarsen the mesh, playing with the element size is correct.
- If the simulation is not converging with a coarser mesh this means you should refine the grid resolution and cross-check your results.

Baris

andreia_melo · November 8, 2018, 05:17

Thank you, i will try to change the number of layers.

November 7, 2018, 07:47	Refine mesh with inflation	#1
andreia_melo New Member Andreia Join Date: Jun 2018 Posts: 13 Rep Power: 7	Hi, I'm very new at fluent and doing a 2D simulation of a valveless pulsejet, a did the mesh with inflation in order to obtain a yplus between 30 to 300 but now i'm trying to do a study of mesh independence but it is not converging. The refinament option is not available so i'm decreasing the element size but i'm not changing the inflation, should i refine the inflation too? But how? Please help me

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November 7, 2018, 09:53		#2
bpulat Member Baris PULAT Join Date: Sep 2016 Location: Italy Posts: 59 Rep Power: 9	Hey Andreia, - If your first yplus values are all in range, you shouldn't change the dimension of your first inflation layer in your mesh study. - But if necessary you can work around the total number of inflation layers. - To refine or to coarsen the mesh, playing with the element size is correct. - If the simulation is not converging with a coarser mesh this means you should refine the grid resolution and cross-check your results. Baris

November 8, 2018, 05:17		#3
andreia_melo New Member Andreia Join Date: Jun 2018 Posts: 13 Rep Power: 7	Thank you, i will try to change the number of layers.