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-   -   [DesignModeler] Sweeping or surface meshing in enclosure? (http://www.cfd-online.com/Forums/ansys-meshing/73542-sweeping-surface-meshing-enclosure.html)

Edu-R March 10, 2010 22:00

Sweeping or surface meshing in enclosure?
 
Hi all!

I have a problem with the new Ansys 12.1.

I need to simulate a rear wing with Fluent, so I make a geometry with CATIA (only one side because is symmetrical) and then I import directly in Workbench. For meshing the air, I use the tool called "Enclosure" in "Design Modeler" and then I mesh it. I can do the inflation and sizing, but I want to do a Quad Mapped Face in the surface of the wing and flap. In the solid wing, I can do it by a Sweep Method, but in the "air" (or enclosure), it doesnīt recognize it as a sweepable surface, so I get a Tri Mapped Face. ŋHow can I do it? ŋIs it possible to mesh a surface and then the air (or enclosure) like I do with Gambit?


http://img408.imageshack.us/img408/7...lidwing.th.jpg


http://img708.imageshack.us/img708/121/meshedair.th.jpg


Thanks in advance!

Regards:

-Edu-

Edu-R March 12, 2010 16:06

Any idea? :confused:

PSYMN March 14, 2010 16:48

This is on the list of things to do (setting a mapped region to a surface of a volume that will be patch dependent filled). It just hasn't been done yet.

You really want to take it a step beyond that though and have a hexa boundary region...

You can do this by "cutting out" a sweepable region around the airfoil and sweeping along its length...

Try the MultiZone method once you have that cut out the way you want.

Edu-R March 14, 2010 20:06

Quote:

Originally Posted by PSYMN (Post 249905)
You can do this by "cutting out" a sweepable region around the airfoil and sweeping along its length...

Hi Simon!

First of all thanks for your answer!

I donīt understand very well this step. How can I cut out a region around the airfoil?

When I have all the solids active (the wing, flap, support, endplate and enclosure), I select the option "Show sweepable bodies". The only marked bodies are wing and flap, but no faces on enclosure, that is the body that I want to mesh.

Regards:

-Edu-

PSYMN March 15, 2010 10:14

Slice out a sweepable volume around each airfoil.
 
Right, so you need to subdivide the main flow region into sweepable bodies... you would sketch out a shape that represents the outside of inflation layer then slice it thru the model. This will slice out another piece that can be swept (around your airfoil)... You will then put this slice back into a multibody part with the rest of the fluid volume and then mesh the regions...

Simon

Edu-R March 15, 2010 12:08

Hi Simon!

Thanks for the explanation, now I have understood :)

I will try it, but doing the fluid in CATIA instead of doing enclosure, because it is easier to modify or doing multiple bodies.

Thank you very much for your help!

Regards:

-Edu-

Edu-R March 16, 2010 15:31

Hi again Simon!

It works! But now I have another problem, I canīt do an inflation around the airfoil. When I select "multizone" method, the inflation becomes supressed. Do you know why?

Thanks!

Regards:

-Edu-

PSYMN March 18, 2010 21:09

The Sweep is the boundary layer...
 
The sweep is the boundary layer. No other inflation should be necessary...

But now you have me thinking about how to control it...

Keep in mind that I am more of an ICEM CFD guy. In ICEM CFD, MultiZone gives you all the blocking edges and I could easily control the edge distribution to grow away from the wall. But I am not exactly sure how it should work in ANSYS Meshing where the blocking is hidden...

One of these days, I will give it a try. But I am probably too busy in the very near future. Do you have access to the help desk? 1-800-937-3321 if you are in the USA...

Edu-R March 18, 2010 21:55

Hi!

Quote:

Originally Posted by PSYMN (Post 250725)
The sweep is the boundary layer. No other inflation should be necessary...

I didnīt know this!

Quote:

Originally Posted by PSYMN (Post 250725)
One of these days, I will give it a try. But I am probably too busy in the very near future. Do you have access to the help desk? 1-800-937-3321 if you are in the USA...

Donīt worry about that. Today I learned how the "Line sizing" works with the bias and growing distribution, so I will use this to reduce the number of cells, instead of the method of subdivision the flow region (the final geometry is a little bit complex). I did the question because I didnīt believe that this option was not included. :(

Thank you very much for your answers and help! ;)

Regards:

-Edu-

Elvislrs January 23, 2013 14:41

Problem with Ansys EMAG
 
Hi friends I need help about Electromagnetic Analysis Ansys.I designed the machine in solidworks, but when I go to establish the boundary conditions of the error saying that my mash can not be completed due to "glue" the magnet not be the same shape and size. Can someone help me?


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