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[ICEM] Bluff Body Hybrid Mesh Icem

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Old   March 5, 2013, 11:39
Default Bluff Body Hybrid Mesh Icem
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Hello everybody
I need to replicate for my thesis an hybrid mesh of a bluff body using ICEM 13. I attached some pictures of the original mesh. What is the best way?

thanks in advance
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Old   March 5, 2013, 11:57
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the person before you created a box around your bluff body. he blocked the geometry. then he generated an unstructured mesh for the outside box. and merged them together. look in the forum for merging structured and unstructured mesh.
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New to ICEM CFD, try this document --> http://goo.gl/G2gkE
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Old   March 5, 2013, 13:47
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Sijal Ahmed Memon (turboenginner@gmail.com)
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Ahmed body?
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Old   March 5, 2013, 13:54
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Quote:
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Ahmed body?
You mean FAR body
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New to ICEM CFD, try this document --> http://goo.gl/G2gkE
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Old   March 5, 2013, 14:09
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Quote:
Originally Posted by diamondx View Post
You mean FAR body
Hehe

Quote:
I need to replicate for my thesis an hybrid mesh of a bluff body using ICEM 13. I attached some pictures of the original mesh. What is the best way?
You have same case? Attach representative geometry
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Old   March 5, 2013, 14:12
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What does it mean ahmed body??

p.s.:thanks Ali for the quick reply )
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Old   March 5, 2013, 14:19
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It is automotive research model.
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Old   March 5, 2013, 14:27
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how have you understood that is related to automotive? :S impressive )) btw it's a project for the Sauber team. They want to study the flow within the diffuser of a F1 car. I started yesterday to work with ICEM, it's quite tricky :S I am trying to build a structured mesh around the body. But I don't understand if the blocks have to cover the whole body, how many blocks I have to use and how to create a block around the sideplate...
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Old   March 5, 2013, 14:50
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Actually i guessed it due to two reasons: distance from lower boundary and shape.

Either you can follow the full hexa mesh method Ahmed body Hexa mesh (with legs) or look for thread in this forum on hybrid mesh (Diamondx has done the wonderful job in this area, look for hi threads)
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Old   March 6, 2013, 17:29
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Thanks a lot for the video!! it's very helpfull. However I have a dummie question...the software will create the mesh only inside the blocks?? I mean, in my model I have to avoid any blocks inside the body?? Thanks
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Old   March 7, 2013, 00:38
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No it will not create mesh inside the body if you don't want.
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Old   March 7, 2013, 07:41
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Ok I understand. In my case I don't want to mesh inside the body and I associate the blocks inside the body with the solid part. After that before to compute the mesh I deselect the solid part. is it the right way??
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Old   March 7, 2013, 07:50
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Yes. You have two options either you make it solid (and uncheck it when making mesh) or delete it. I usually prefer the first approach.

Another advantage of having solid is when you want to make the o-grid around the vehicle. In this case you just select the solid and make the o-grid around it.
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Old   March 9, 2013, 11:45
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Ok I used o-grid to split the blocks around the body and it worked well well thx. btw I have a further problem, I wan't to improve the mesh in the junction between the ramp and the side-plate of the diffuser (red circle). I would like to use unstructured mesh for the red triangle block but I don't understand how I can do it.
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Old   March 9, 2013, 11:56
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Use Y-block to mesh triangle region.

Quarter O-grid from vertices and !!!!!! Why?
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Old   March 9, 2013, 12:11
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ok thx for the link. however I'd like to know if it's possible juest to select a block and impose to use different elements
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Old   March 9, 2013, 15:19
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Yes you change type of block to swept, free etc. Go to edit block and set block type.
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Old   March 10, 2013, 13:52
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in order to replicate the solution in the red circle how can I do? I don't understand if I have to modify the block associated to the fluid or the block associated to the solid.
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Old   March 12, 2013, 18:20
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I can't still solve the problem of the elements in the corner of the side plate. I tried with Y-block but it doesn't solve the problem. I uploaded 2 pictures, one of the blocks and one of the mesh. Can you give me some suggestions?? thanks
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Old   March 12, 2013, 18:58
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is it symmetric or full model?
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