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Forum: ANSYS Meshing & Geometry

May 30, 2012, 12:21

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

http://www.cfd-online.com/Forums/fluent/102642-ahm...

http://www.cfd-online.com/Forums/fluent/102642-ahmed-body-simulation.html#post363878

Forum: ANSYS Meshing & Geometry

May 30, 2012, 12:16

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

Yes you are right :) I'm going to create a new...

Yes you are right :) I'm going to create a new topic

Forum: ANSYS Meshing & Geometry

May 30, 2012, 12:15

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

Sorry I set turbulence intensity at 0.25% which...

Sorry I set turbulence intensity at 0.25% which is the upper limit of the wind tunnel

Forum: ANSYS Meshing & Geometry

May 30, 2012, 12:11

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

Why 1% turbulence intensity? I set it to 2.5, but...

Why 1% turbulence intensity? I set it to 2.5, but i wil try with your settings. Now i velocity inlet with 40m/s and ambient pressure, pressure outlet at the same ambient pressure ( with operating...

Forum: ANSYS Meshing & Geometry

May 30, 2012, 11:21

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

Ok I run a simulation with your settings and got...

Ok I run a simulation with your settings and got convergence in 250 iterations, with residuals below 10^-5. But cd is stable at 0.289. What's are your BCs?

Forum: ANSYS Meshing & Geometry

May 29, 2012, 17:57

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

Thank you! This helps me a lot. Two questions....

Thank you! This helps me a lot. Two questions. How can you set the courant number for pressure based steady solver? Coupled method is available only for pressure based. Did you use pseudo transient?...

Forum: ANSYS Meshing & Geometry

May 29, 2012, 16:00

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

Ok with my settings as I wrote here above now...

Ok with my settings as I wrote here above now seems to be ok. I just switched to coupled solver with pseudo transient to speed things up and it's working. When finished I try with enhanced wall...

Forum: ANSYS Meshing & Geometry

May 29, 2012, 15:54

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

What settings and turbulence model?

What settings and turbulence model?

Forum: ANSYS Meshing & Geometry

May 29, 2012, 15:49

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

I'm actually using far3. What do you suggest?

I'm actually using far3. What do you suggest?

Forum: ANSYS Meshing & Geometry

May 29, 2012, 15:45

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

:) Did you have difficulties on convergence? I...

:) Did you have difficulties on convergence? I see that with k-e realizable, all solution methods on second order and default solution controls, continuity residuals slowly diverge. But almost...

Forum: ANSYS Meshing & Geometry

May 29, 2012, 14:29

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

Ok now it works. I'm going to launch simulation....

Ok now it works. I'm going to launch simulation. Why you use material point? What is its utility?

Forum: ANSYS Meshing & Geometry

May 29, 2012, 13:20

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

Thank you for your help, but when I load your...

Thank you for your help, but when I load your files .prj icem tells me that file .atr or .fpb is missing and the premesh looks distorted as you can see in the picture. What's wrong?

Forum: ANSYS Meshing & Geometry

May 29, 2012, 05:05

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

Yes I'm trying to replicate that experiment. For...

Yes I'm trying to replicate that experiment. For now I'm only doing a mesh convergence study, with a basic k-epsilon model, surprisingly obtaining a good prediction of cd (less than 2% error, despite...

Forum: ANSYS Meshing & Geometry

May 29, 2012, 04:57

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

Using Orthogonality quality criterion those...

Using Orthogonality quality criterion those elements are above 0.8 but i think that's not the same criterion used by Fluent. What criterion should I check? In icem worst elements are on the lateral...

Forum: ANSYS Meshing & Geometry

May 28, 2012, 09:04

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

Yes I checked in fluent the mesh i attached here...

Yes I checked in fluent the mesh i attached here and asks me to repair wall distance. quality about 0.09, very low, and the simulations goes overflow (even in dp). Maximum aspect ratio over 30k (far...

Forum: ANSYS Meshing & Geometry

May 28, 2012, 07:47

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

where do you see that? in orthogonal quality...

where do you see that? in orthogonal quality icems shows me a minimum quality of 0.5. How can I improve edge parameters? Any advice?
Thanks

Forum: ANSYS Meshing & Geometry

May 28, 2012, 05:36

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

.tin and .blk files

Thank you very much!

Forum: ANSYS Meshing & Geometry

May 27, 2012, 17:33

Replies: 56

[ICEM] Mesh Quality

Views: 39,410

Posted By alenglaro

Mesh Quality

Hello,
I'm trying to mesh an ahmed body in ICEM. As you can see in the picture I achieved a fairly satisfactory result. Premesh quality is above 0.5, as well as orthogonal quality once i converted...

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