Learning Forum

[chebusann]

Hi,

I'm studying aerodynamic behavior of a body car in Fluent. Before I compute the simulation (Workbench>Setup>Run calculation), I check case and a recommendation appears:

"Maximum cells skewness is greater than 0.98. Consider improving the mesh quality before proceeding with your simulation"

Do someone know what is happening?

[Rahul Kumar]

Hello, 

Yes, this is a recommendation by Fluent. You can re-mesh it in Fluent Meshing and improve the mesh quality. I would suggest using the water-tight geometry work flow to improve the mesh quality. 

[chebusann]

Rahul, thanks a lot for the reply. I see a video about Watertight Geometry Meshing Workflow, but I can not see where is it. Do I have to download Workflow o something like that? Thanks!

[chebusann]

It's Watertight Geometry Meshing Workflow available in ANSYS 2019 R2?

[Rahul Kumar]

Yes, it is available. Under the workflow tab, in the dropdown menu you will find watertight geomerty. 

[chebusann]

Sorry, but where is the workflow tab? Or what do you mean with workflow tab?

This is the toolbox in Workbench 2019 R2 and it has not Watertight geometry

 

[chebusann]

All this problems are because when I'm in Setup (FFF Workbench) and trying to see my results, I need to lower my skewness down to 0.95 or less. Now skewness is over 0.98.

So, in this case Watertight geometry is great, but I can not find it. Thanks in advance to let me know of Watertight geometry.

[Ulrich]

Hi,

You find the "Watertight Geometry Workflow" in "Fluent Meshing". See for example: https://www.youtube.com/watch?v=M8A34XVD5qs

Ulrich S.

[chebusann]

Thanks Ulrich. Yes, I saw this video earlier, but it is ANSYS 2020 R1, and I have ANSYS 2019 R2 as I told to Rahul.

I do the same as the video, I open Fluent (with Fluent Meshing) and it only appears "Outline view", it's not showing Watertight Geometry.

 

 

 

I also read ANSYS help but it does not say how to add watertight geometry

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v194/flu_ug/ch07s01s02.html

 

 

[Rahul Kumar]

Can you open using the Fluent standalone version? Open using Start --> Ansys 2019 R2 --> Fluent 2019 R2

[chebusann]

Rahul, thanks. Finally I can see Watertight Geometry. Now I have a new problem:

When I import geometry in Watertight Geometry I have an error:

"python.exe stopped working" (it's in spanish because I'm from Argentina)

Error module is "Ans.CadInt.PartMgrCOM.dll". I think this is the driver. I don't know what's happening now.

 

 

[Rahul Kumar]

Can you please start a new discussion on this? It will help members in this community. Thanks.