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-   -   [ANSYS Meshing] import mesh to Workbench mesher (http://www.cfd-online.com/Forums/ansys-meshing/83884-import-mesh-workbench-mesher.html)

la7low January 13, 2011 22:09

import mesh to Workbench mesher
 
Is there a way to import any kind of mesh to Ansys Workbench mesher? I can not find that function...
Thanks for the answer in advance!

PSYMN January 14, 2011 12:05

Skin it.
 
Not yet...

At the moment, the ANSYS Meshing tool requires geometry to apply bocos, etc. so it can't take in a mesh without a geometry...

HOWEVER...

The Free (in Workbench) FE Modeler tool can import a mesh (such as a Nastran Mesh) and "Skin it", then you can send it from FE Modeler to ANSYS Meshing with the existing mesh or to remesh it, etc.

Also, our Extended Meshing tools like ANSYS ICEM CFD or ANSYS TGrid can import 3rd party meshes (without geometry).

sac January 14, 2011 13:36

Yes it can :)

  • On the Workbench Project page drag in a mesh cell
  • Then right click on the mesh portion of that cells (so A2 in a clean schematic)
  • Click import mesh and give it your mesh file.
You cannot change the mesh in Meshing however without going through the process Simon mentioned.

PSYMN January 14, 2011 16:37

Imported Mesh system...
 
1 Attachment(s)
Oh yes, But that doesn't get the mesh into ANSYS Meshing, it just gets it onto the schematic so you can import it into ANSYS Fluent or CFX by dragging and dropping those systems onto the Imported Mesh field.

This would be similar to just opening one of these programs (just use a Fluent or CFX system and launch them without a mesh) and then import the mesh directly into the solver.

Attachment 6060

We are working on this and should be able to do a lot more with an imported mesh at some point... ;^)

la7low January 14, 2011 18:52

Quote:

Originally Posted by sac (Post 290473)
Yes it can :)

  • On the Workbench Project page drag in a mesh cell
  • Then right click on the mesh portion of that cells (so A2 in a clean schematic)
  • Click import mesh and give it your mesh file.
You cannot change the mesh in Meshing however without going through the process Simon mentioned.

Thanks for the answers, yes I tried it and it is like both of you wrote: the mesh can not even be opened for viewing in Ansys meshing, so practically it is just like an import to CFX/Fluent (in case of CFD simulation like mine).

la7low January 14, 2011 19:30

a bit of description and new question
 
Quote:

Originally Posted by PSYMN (Post 290463)
Not yet...

At the moment, the ANSYS Meshing tool requires geometry to apply bocos, etc. so it can't take in a mesh without a geometry...

HOWEVER...

The Free (in Workbench) FE Modeler tool can import a mesh (such as a Nastran Mesh) and "Skin it", then you can send it from FE Modeler to ANSYS Meshing with the existing mesh or to remesh it, etc.

Also, our Extended Meshing tools like ANSYS ICEM CFD or ANSYS TGrid can import 3rd party meshes (without geometry).

Probably then my only choice is to use Icem CFD, then export the mesh back to workbench somehow.
My whole problem arises from an axial fan cfd simulation, in which the rotor itself is surrounded by a fairly complicated geometry (not just a channel). So in this case Turbogrid mesher fails to build nice mesh for the complicated inlet/outlet domains, though It can make a suprisingly good quality mesh around the blades (especially with ATM optimized topology, the guy who invented that must be a genius). So the Turbogrid mesh is confined only to the rotor, but then I must connect the inlet/outlet meshes to it. But, as I'd like to simulate only 1 blade passage, it is advisable to minimize the numerical error arising from different interface areas (pitch ratio not equal to 1) between the inlet domain's outlet and the rotor inlet (as well as between the rotor outlet and the inlet of the outlet domain).
I reached the point I wanted: so I'd like to start my inlet/outlet domain meshes from the rotor's mesh which is generated by Turbogrid (see my other post too: http://www.cfd-online.com/Forums/ans...tml#post290353). That is why I wanted to import the rotor mesh to Ansys mesher to build the inlet mesh using rotor's inlet/outlet. This solution looks a dead end (at least with current Ansys mesher), but I was able to export the mesh to Icem CFD and generate inlet geometry (by converting face mesh to geometry) and could do the inlet/outlet domain meshes there in Icemcfd and export those back to workbench to CFX-pre. My question is: can I do this latter method with Icem CFD without loosing the possibilty to exploit the nice parametric study capabilities of workbench (as Icem CFD is not a component system of workbench (why not actually?) ?
Can I use some scripting feature of Icem CFD to update the inlet/outlet domain meshes, but keeping the simulation (mesh generation) automatic in workbench to make parametric case studies?
Thanks for the answer in advance, again! And sorry for the long post...

la7low January 14, 2011 22:10

hmm...could be a good idea
 
Quote:

Originally Posted by PSYMN (Post 290463)
The Free (in Workbench) FE Modeler tool can import a mesh (such as a Nastran Mesh) and "Skin it", then you can send it from FE Modeler to ANSYS Meshing with the existing mesh or to remesh it, etc.

I tried this method too, I could export my turbogrid mesh of the rotor to the FE Modeler. It had all the boundaries as components, so didn't make any skin detection. I opened the .fedb file with DesignModeler it was ok, but could go and edit it and the Ansys mesher. The workbench lists 2 problems:
Plugin error: Attach failed
Unable to attach geometry

Any other ways to send the geometry from FE Modeler other than in its own .fedb file?

I used the templates as well:
the stl template is not too good, as it would output all my cells just tris insted of quads, right?
Is there a template for outputting to .iges from FE modeler? That would be nice...

PSYMN January 15, 2011 01:38

Skin...
 
You must skin it...

The skinning (Geometry synthesis) is critical for getting the model into ANSYS Meshing or ANSYS Mechanical.

It is also required before you can convert the geometry into bsplines for output to IGES or Parasolid.

la7low January 15, 2011 17:36

confusion
 
2 Attachment(s)
Ahh ok. So does the "intitial geometry" feature only take into account the skinned geometry? So it disregards the components, right?
When I convert the initial geometry to parasolid will it respect the details of skin detect tool (e.g. tolerance angle) or will it respect the geometry sythesis parameters like vertex insertion angle?
Thanks!
What about the other method with Icem? Can Icem be connected somehow to a workbench project (eg via scripting) in Ansys 13?

Saima June 27, 2012 16:45

Can i import mesh from ICEM to ANSYS mechnaical with geomtery, as I have to implement boundary condition in ANSYS?

Regards

ARS October 23, 2013 14:35

My .msh file is not getting imported in fluent.

Please help me out.

Far October 23, 2013 15:56

what's the error message you are getting?


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