Creating structured mesh around a submarine with ICEM

ash1370 · September 12, 2014, 10:05

Hi,

I have recently received a project for one of my works, it is about simulating flow around a submarine. I'm a student and familiar with unstructured mesh, But, I want to create structured mesh around submarine. Because of having little time, I really need a tutorial or guide about creating Hexa mesh around a submarine. I'll be very grateful if you can help me.
I have a question too, does unstructured mesh for submarine gives good results or I just have to create structured mesh.

Thanks.

flotus1 · September 12, 2014, 13:04

My honest opinion is that "little time", "little experience with hexahedral mesh generation" and "complex geometries" dont go together very well.
Would it not be possible to to perform the analysis with automatically generated meshes? For "standard" simulations, tetrahedral meshes can also give reliable results.
What is the aim of the simulation?

ash1370 · September 13, 2014, 06:21

Dear Alex, thanks for your honest answer. The purpose of simulation is to investigate the effect of surface roughness on drag coefficient of submarine. can I get reliable answers with tetrahedral meshes in this case? and one more thing, what do you mean by ''automatically generated meshes''?

flotus1 · September 15, 2014, 05:01

So you are using some RANS turbulence model to find an integral quantity, the drag coefficient. This should be possible with tetrahedral meshes too.
I use the term ''automatically generated meshes'' for all kinds of meshes that require very little input from the user compared to a block-structured hexahedral mesh. Tetrahedral meshes are one of them.

September 12, 2014, 10:05	Creating structured mesh around a submarine with ICEM	#1
ash1370 New Member Join Date: Sep 2014 Posts: 5 Rep Power: 12	Hi, I have recently received a project for one of my works, it is about simulating flow around a submarine. I'm a student and familiar with unstructured mesh, But, I want to create structured mesh around submarine. Because of having little time, I really need a tutorial or guide about creating Hexa mesh around a submarine. I'll be very grateful if you can help me. I have a question too, does unstructured mesh for submarine gives good results or I just have to create structured mesh. Thanks.

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September 12, 2014, 13:04		#2
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,427 Rep Power: 49	My honest opinion is that "little time", "little experience with hexahedral mesh generation" and "complex geometries" dont go together very well. Would it not be possible to to perform the analysis with automatically generated meshes? For "standard" simulations, tetrahedral meshes can also give reliable results. What is the aim of the simulation?

September 13, 2014, 06:21		#3
ash1370 New Member Join Date: Sep 2014 Posts: 5 Rep Power: 12	Dear Alex, thanks for your honest answer. The purpose of simulation is to investigate the effect of surface roughness on drag coefficient of submarine. can I get reliable answers with tetrahedral meshes in this case? and one more thing, what do you mean by ''automatically generated meshes''?

September 15, 2014, 05:01		#4
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,427 Rep Power: 49	So you are using some RANS turbulence model to find an integral quantity, the drag coefficient. This should be possible with tetrahedral meshes too. I use the term ''automatically generated meshes'' for all kinds of meshes that require very little input from the user compared to a block-structured hexahedral mesh. Tetrahedral meshes are one of them.