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-   -   [ICEM] HEXA mesh (http://www.cfd-online.com/Forums/ansys-meshing/105205-hexa-mesh.html)

freedomman July 25, 2012 05:38

HEXA mesh
 
1 Attachment(s)
hello everyone,
I wanna figure out the hexa mesh of the geometry in attach, as you can see in the blk document, I try to dig out a little cuboid in the center. But I always meet the problem of Volume Orientation who is not able to be fixed, what I do is just delete those bad nodes. Then when I export this mesh to Fluent, it mentions Aborted due to critical error, non of the signs else.
Could you please take a look at of the blk where my mistakes are, what I can do now? cause I'm quite new in using ICEM and I spent pretty much time on this
Thanks a lot

Far July 25, 2012 07:53

I see many surfaces and curves which I think are unnecessary. Are you sure these surfaces and curves are necessary or only the centre cuboid and outer boundaries?

freedomman July 25, 2012 08:35

I was trying to give different mesh sizes to each part, but what is necessary is only the contour with the centre cuboid


Quote:

Originally Posted by Far (Post 373447)
I see many surfaces and curves which I think are unnecessary. Are you sure these surfaces and curves are necessary or only the centre cuboid and outer boundaries?


freedomman July 26, 2012 10:22

I modified the blocking and move the bottom vertices of the cuboid, then I obtained a more flat angle for the sloping part . (as attached in main post)
Now there is no Volume Orientation problem any more, but when I export this new mesh to Fluent, it rejected with the same reason "Aborted due to critical error".
I can't find where the problem might be, could you please help me?

Far July 27, 2012 10:09

1 Attachment(s)
Done........ There is some trick in the blocking.

1. Merge vertices
2.Creation of Y-block
3. Another split for the dead block
4. Conversion the two blocks outside the geometry into dead block

PS: I have deleted all unnecessary curves, points and surfaces.

http://img35.imageshack.us/img35/4922/77508236.png

http://img338.imageshack.us/img338/2241/97503859.png

http://img232.imageshack.us/img232/3672/16343444.png

http://img844.imageshack.us/img844/5192/37866218.png

http://img266.imageshack.us/img266/7192/70661141.png

http://img225.imageshack.us/img225/3711/44372358.png

http://img254.imageshack.us/img254/5213/86528698.png

freedomman July 27, 2012 10:27

Many thanks, Far
I'll read it now

Far July 27, 2012 10:29

please uncheck the following parts (if they are enabled):

dead, solid and VORFN

cfd seeker July 30, 2012 11:42

hi Far
What is the need of the dead block? have you associated some of its vertices with the geometry? and how it is separated from the geometry so that its not part of the mesh? Thanks

Regards

Far July 30, 2012 14:04

One picture is equal to thousand words:D and I guess one video is equal to thousand pictures;). So here is the video for queries you have just asked;)

http://www.youtube.com/watch?v=ys1tO...ature=youtu.be

freedomman July 30, 2012 17:04

great............thanks

Far July 30, 2012 18:38

Quote:

Originally Posted by cfd seeker (Post 374371)
hi Far
What is the need of the dead block? have you associated some of its vertices with the geometry? and how it is separated from the geometry so that its not part of the mesh? Thanks

Regards

changing the material is same as when you delete the block and it goes to VORFN, therefore it disconnects itself from remaining mesh. When you uncheck that material from parts list it is no more part of active mesh (name does not matter, you can rename dead to live or even 007;))

cfd seeker August 1, 2012 11:04

Quote:

Originally Posted by Far (Post 374433)
changing the material is same as when you delete the block and it goes to VORFN, therefore it disconnects itself from remaining mesh. When you uncheck that material from parts list it is no more part of active mesh (name does not matter, you can rename dead to live or even 007;))

millions of thanks for the video and live, dead and 007 combination is itself deadly and suspicious :P


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