[ICEM] Complex 3D geometry Hexa blocking and inflation layer

Chipsgrottel · September 26, 2011, 02:43

Hello everybody,

I am currently working on the meshing process of a very complex geometry (see the printscreens).

To have a better idea of the different volumic parts composing this part, I've tried to upload a small gif animation (the flow enters on the left side, goes through the purple tube, then goes out by the 8 holes to an annular part and goes downstream to the right)
Follow this link to see it: http://img851.imageshack.us/img851/9885/s9o.mp4

Unfortunately I am encountering a few problems and doubts:

I want a smoothly refined mesh nearby the walls, that is why I play with the edge parameter on the O-grids I already defined. It works pretty well around the area of interest but how can I avoid it to propagate in the middle of the volume part? (the picture represents a cut-view in the midplane z, perpendicular to the stream)
Then I am trying O-grids that do not work. I assume that I have to make them go through everything even if I just want them around the 8 holes you can see on the video (and where I want the refined boundary as well).
It might be due to the fact that I already have almost 300 blocks but the resulting blocks from the O-grid cut are all inverted and it is really hard to size them and control anything about them.
To finish I have issues while importing the mesh to Fluent: I get this error message:
Building... mesh
Cell Centroid is xc 162.783433 yc -9.597915 zc -8.724681
WARNING: no face with given nodes. Thread 35, cell 254010
Clearing partially read grid.

Error: Build Grid: Aborted due to critical error.
Error Object: #f

I would be really grateful for any help.
Thank you in advance for your attention.

Charles

Chipsgrottel · September 28, 2011, 16:28

Anybody has an idea?
At least for the bounday layer inflation issue?

BrolY · September 29, 2011, 04:15

I can't see your picture and I don't have access to the web site imageshack at work. Post your CAO here so we could have a look.

About your fluent error, you should create a new thread.

Chipsgrottel · September 29, 2011, 09:58

Hi BrolY,

Is parasolid ok?
In my post I focused on the first left half of the geometry as you will see. But I think my problem is going to be the same for the second half.
Thank you very much for your help.

BrolY · September 30, 2011, 04:25

Sorry I can't open parasolid geometry file. Please convert it to .Stl format.
Thanks

September 26, 2011, 02:43	Complex 3D geometry Hexa blocking and inflation layer	#1
Chipsgrottel New Member Charles de Luzan Join Date: Jun 2010 Location: Cincinnati, OH Posts: 12 Rep Power: 16	Hello everybody, I am currently working on the meshing process of a very complex geometry (see the printscreens). To have a better idea of the different volumic parts composing this part, I've tried to upload a small gif animation (the flow enters on the left side, goes through the purple tube, then goes out by the 8 holes to an annular part and goes downstream to the right) Follow this link to see it: http://img851.imageshack.us/img851/9885/s9o.mp4 Unfortunately I am encountering a few problems and doubts: I want a smoothly refined mesh nearby the walls, that is why I play with the edge parameter on the O-grids I already defined. It works pretty well around the area of interest but how can I avoid it to propagate in the middle of the volume part? (the picture represents a cut-view in the midplane z, perpendicular to the stream) Then I am trying O-grids that do not work. I assume that I have to make them go through everything even if I just want them around the 8 holes you can see on the video (and where I want the refined boundary as well). It might be due to the fact that I already have almost 300 blocks but the resulting blocks from the O-grid cut are all inverted and it is really hard to size them and control anything about them. To finish I have issues while importing the mesh to Fluent: I get this error message: Building... mesh Cell Centroid is xc 162.783433 yc -9.597915 zc -8.724681 WARNING: no face with given nodes. Thread 35, cell 254010 Clearing partially read grid. Error: Build Grid: Aborted due to critical error. Error Object: #f I would be really grateful for any help. Thank you in advance for your attention. Charles Last edited by Chipsgrottel; September 26, 2011 at 11:12.

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September 28, 2011, 16:28		#2
Chipsgrottel New Member Charles de Luzan Join Date: Jun 2010 Location: Cincinnati, OH Posts: 12 Rep Power: 16	Anybody has an idea? At least for the bounday layer inflation issue?

September 29, 2011, 04:15		#3
BrolY Senior Member AB Join Date: Sep 2009 Location: France Posts: 323 Rep Power: 22	I can't see your picture and I don't have access to the web site imageshack at work. Post your CAO here so we could have a look. About your fluent error, you should create a new thread.

September 30, 2011, 04:25		#5
BrolY Senior Member AB Join Date: Sep 2009 Location: France Posts: 323 Rep Power: 22	Sorry I can't open parasolid geometry file. Please convert it to .Stl format. Thanks