[ICEM] Volume mesh gradient

ulalala · August 21, 2012, 07:58

Hi all,

I am meshing a convergent divrgent nozzle in ICEM CFD. But I have been breaking my head over getting a very fine mesh on the throat area and then gradually increasing the cell size towards inlet and outlet side.

I also wanted to create boundary layer close to wall.

Please help.

ulalala · August 21, 2012, 08:22

I have tried the mesh density option for creating mesh size gradient, but with a expansion ratio of 1.5 the mesh size has been constant throughout.

Saumya.

diamondx · August 21, 2012, 09:10

a convergent-divergent nozzle is very suitable for a structured mesh. you can then use play with the space between the nodes... is it 2d or 3d ? is it structured ? also diferrent cases were discussed in this forum, please use the search button on top and see the thread that discuss this. if you don't find what you need, come back here. hope it can help...

ulalala · August 22, 2012, 12:14

Hi Ali,

I am trying to model it in 3D. I did try the structured mesh with the desired gradient, but the quality was very poor.

I also searched in the forum, but could not get anything

Can you plese share a link to the discussion, it would be very helpful.

Thanks

Saumya

diamondx · August 22, 2012, 12:15

can you share pictures of your mesh, or your project ? i can take a look at it

August 21, 2012, 07:58	Volume mesh gradient	#1
ulalala New Member SAUMYA Join Date: Jun 2010 Location: PUNE, INDIA Posts: 16 Rep Power: 16	Hi all, I am meshing a convergent divrgent nozzle in ICEM CFD. But I have been breaking my head over getting a very fine mesh on the throat area and then gradually increasing the cell size towards inlet and outlet side. I also wanted to create boundary layer close to wall. Please help.

August 21, 2012, 09:10		#3
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 29	a convergent-divergent nozzle is very suitable for a structured mesh. you can then use play with the space between the nodes... is it 2d or 3d ? is it structured ? also diferrent cases were discussed in this forum, please use the search button on top and see the thread that discuss this. if you don't find what you need, come back here. hope it can help... __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

August 22, 2012, 12:15		#5
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 29	can you share pictures of your mesh, or your project ? i can take a look at it __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

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August 21, 2012, 08:22		#2
ulalala New Member SAUMYA Join Date: Jun 2010 Location: PUNE, INDIA Posts: 16 Rep Power: 16	I have tried the mesh density option for creating mesh size gradient, but with a expansion ratio of 1.5 the mesh size has been constant throughout. Saumya.

August 22, 2012, 12:14		#4
ulalala New Member SAUMYA Join Date: Jun 2010 Location: PUNE, INDIA Posts: 16 Rep Power: 16	Hi Ali, I am trying to model it in 3D. I did try the structured mesh with the desired gradient, but the quality was very poor. I also searched in the forum, but could not get anything Can you plese share a link to the discussion, it would be very helpful. Thanks Saumya