[DesignModeler] 2-D meshing for Fluent in Ansys 12

fade · September 7, 2009, 09:27

Hi; our setup just got updated, and now there is no Gambit. I'm trying to make a relatively simple 2-D mesh, but I'm having a lot of trouble. I imported some coordinate points, and then used the DM 'design from points' command to create the lines. I tried creating surfaces, and then meshing them, but the mesher won't let me set boundary conditions or change materials, and Fluent reads in the mesh with negative volumes. Does anyone have any suggestions for how to make a 2-D mesh?

thanks a lot.

PSYMN · September 8, 2009, 09:58

On the right hand side of the project page (or by right clicking on geometry to get "properties"), make sure that "Advanced Geometry Options => Analysis type is set to 2D (default is 3D). Also, make sure that you made your model in the XY plane and Z = 0.

Maldoror · September 16, 2009, 17:16

hi.
I am working with ANSYS 12.0. I made a 2D geometry in the application DesignModeler, but when I load the geometry in the Meshing application, see "? geometry" in the outline tree.
How do I make a 2D geometry?
I do so that the geometry is identified by the Meshing application?
thank you.

PSYMN · September 17, 2009, 09:02

As I last said, go to the project page (before opening ANSYS Meshing), right click on the geometry field and select properties from the pulldown. On the right side a table of properties will pop up and you can make sure that Analysis type is set to 2D...

Simon

Maldoror · September 17, 2009, 13:20

Thank you Simon.

ksguntur · November 10, 2009, 12:58

Hi

I was having the same trouble. I changed the analysis type to 2D but it still does not work. The mesher open and then closes. the error messages in the workbench window says "plugin error: no valid bodies found"

Can any one help please.

Thanks
Krishna.

ksguntur · November 10, 2009, 17:32

Never Mind. I figured it out. Turns out I was doing it wrong.

kousis · November 17, 2009, 12:13

to ksguntur:

i get the same thing. what were you doing wrong?

ksguntur · November 17, 2009, 12:15

I was not actually creating the surface. I sketched it and tried to mesh it. I had to go to concept, create surface from sketch, generate and then try it. Make sure the analysis type is 2D.

kousis · November 17, 2009, 13:15

Thanks ksguntur!

dynamicdom · November 30, 2009, 03:30

hey , my situation:

i made a surface in the desing modeler,meshed it as a 2d plate in the ansys 12 mesher .afterwards i wanted to set boundary conditions for in-/outlet of my streaming channel with a gasket in it.

the point is that i can't set boundary conditions for in-/and outlet.

where can i define inlet/outlet(just edges, because of 2d)?

hope anyone can help me...

regards

kingjewel1 · November 30, 2009, 15:52

Quote:

Originally Posted by dynamicdom

hey , my situation:

i made a surface in the desing modeler,meshed it as a 2d plate in the ansys 12 mesher .afterwards i wanted to set boundary conditions for in-/outlet of my streaming channel with a gasket in it.

the point is that i can't set boundary conditions for in-/and outlet.

where can i define inlet/outlet(just edges, because of 2d)?

hope anyone can help me...

regards

Define your Boundaries in the mesher first. As far as I remember CFX allows you to define them in Pre but fluent doesn't-

PSYMN · December 1, 2009, 00:15

Named selections are the key to CFD boundary conditions in workbench. This is the same for 2D or 3D, except that you apply them to edges instead of faces.

You can do it in DM or the ANSYS Meshing app.

Use the edge selection tool to select the edge (such as the inlet), then right click and choose the option for creating a named selection... name the selection "INLET" and generate...

Then repeat for other important ones. you don't need named selections for walls.

Simon

dynamicdom · December 2, 2009, 04:25

thank you two for your help!

just-right · December 23, 2009, 12:40

Fluid Flow CASE (FLUENT) in the WORKBENCH

I tried the earlier mentioned tips, however I still get the error:

PlugIn Error: No Valid Bodies Found

I imported a sketch as *.CatPart (Catia V5) I generated a surface in DM. I tried it both with and without the imported sketch, both seem to fail. Any tips?

Thanks in advance

PSYMN · December 23, 2009, 22:49

Are you sure you are setup for 2D? Look up in the thread for info about how to do that...

just-right · December 24, 2009, 06:01

It seems the 2-D geometry should be placed on the XY plane. You can import an external geometry created on a different plane, just make sure you import it to the BASE plane XY.

Grid creation in v12 isn't what it should have been though.

SeanQuallen · February 2, 2012, 23:13

Sorry to dig up an old thread, but I'm having this problem as well. I am using a 2D analysis and my surface/line bodies are in the x-y plane. In fact.. they open up in the meshing module and *then* I get the "PlugIn Error..." message. I can then close the message and continue on as if nothing ever happened. I carry on through the solver and I get results with it so I know it works, but I believe this is causing issues during a project wide update/parametric study.

Any ideas? I'm using 13.0 and I have a very simple airfoil/farfield geometrical setup. I drew it up in DesignModeler and created surfaces. This is driving me nuts so any help would be well appreciated!!

PSYMN · February 4, 2012, 15:19

I am guessing that the error is what is stopping your parametric study...

You probably need to sort that out first...

jeff.freeman · August 20, 2012, 19:43

Hi all, I'm new to Workbench (v13.0). I've spent hours trying to apply the suggestions made in this thread to my project, and still have problems. I hope somebody can explain what I'm doing wrong.

I have a text file of point data that is formatted appropriately for the Concept > 3D Curve tool. All of my points are are in the XY plane, with the Z values equal to 0. Marking the "Merge Topology?" option to "Yes", this gives me a Curve1 and single Line Body.

I then use the Concept > Surfaces From Edges tool to create a surface body from those edges. For some reason, I need to manually select all 9 edges from the Model View display. Selecting either the Line Body or the Curve1 from the Tree Outline does not work.

Now I have a Surf2 and a Surface Body, which I set to be a Fluid. After Generating and saving this geometry, I close DM.

Then I ensure that the Analysis Type is set to 2D.

After all of this, I still get the "PlugIn Error: No valid bodies found for 2D Analysis in part Part" error. Any ideas why?

The best reason I can imagine would involve DM only recognizing the 3D Curve as a 3d body, regardless of whether all the points are only in the XY plane.

-Jeff

Edit: I just tried suppressing the Line Body, and it worked! I loaded the geometry into Meshing and it didn't give me an error. Is what I did valid?

September 7, 2009, 09:27	2-D meshing for Fluent in Ansys 12	#1
fade New Member Join Date: Jul 2009 Posts: 2 Rep Power: 0	Hi; our setup just got updated, and now there is no Gambit. I'm trying to make a relatively simple 2-D mesh, but I'm having a lot of trouble. I imported some coordinate points, and then used the DM 'design from points' command to create the lines. I tried creating surfaces, and then meshing them, but the mesher won't let me set boundary conditions or change materials, and Fluent reads in the mesh with negative volumes. Does anyone have any suggestions for how to make a 2-D mesh? thanks a lot.

September 8, 2009, 09:58	Analysis type = 2D	#2
PSYMN Senior Member Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,663 Blog Entries: 1 Rep Power: 47	On the right hand side of the project page (or by right clicking on geometry to get "properties"), make sure that "Advanced Geometry Options => Analysis type is set to 2D (default is 3D). Also, make sure that you made your model in the XY plane and Z = 0. villager and japanese student like this.

September 16, 2009, 17:16	Geomety 2D in ANSYS 12.0	#3
Maldoror New Member Abraham Jaimes Hernandez Join Date: Sep 2009 Location: Mexico City Posts: 6 Rep Power: 16	hi. I am working with ANSYS 12.0. I made a 2D geometry in the application DesignModeler, but when I load the geometry in the Meshing application, see "? geometry" in the outline tree. How do I make a 2D geometry? I do so that the geometry is identified by the Meshing application? thank you.

September 17, 2009, 09:02	back on the project page.	#4
PSYMN Senior Member Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,663 Blog Entries: 1 Rep Power: 47	As I last said, go to the project page (before opening ANSYS Meshing), right click on the geometry field and select properties from the pulldown. On the right side a table of properties will pop up and you can make sure that Analysis type is set to 2D... Simon

November 10, 2009, 12:58	Same trouble	#6
ksguntur New Member kris Join Date: May 2009 Posts: 4 Rep Power: 16	Hi I was having the same trouble. I changed the analysis type to 2D but it still does not work. The mesher open and then closes. the error messages in the workbench window says "plugin error: no valid bodies found" Can any one help please. Thanks Krishna.

September 17, 2009, 13:20		#5
Maldoror New Member Abraham Jaimes Hernandez Join Date: Sep 2009 Location: Mexico City Posts: 6 Rep Power: 16	Thank you Simon.

November 10, 2009, 17:32		#7
ksguntur New Member kris Join Date: May 2009 Posts: 4 Rep Power: 16	Never Mind. I figured it out. Turns out I was doing it wrong.

November 17, 2009, 12:13		#8
kousis New Member Join Date: Nov 2009 Posts: 3 Rep Power: 16	to ksguntur: i get the same thing. what were you doing wrong?

November 17, 2009, 12:15		#9
ksguntur New Member kris Join Date: May 2009 Posts: 4 Rep Power: 16	I was not actually creating the surface. I sketched it and tried to mesh it. I had to go to concept, create surface from sketch, generate and then try it. Make sure the analysis type is 2D. m.najminoori likes this.

November 17, 2009, 13:15		#10
kousis New Member Join Date: Nov 2009 Posts: 3 Rep Power: 16	Thanks ksguntur!

November 30, 2009, 03:30		#11
dynamicdom New Member Join Date: Nov 2009 Posts: 8 Rep Power: 16	hey , my situation: i made a surface in the desing modeler,meshed it as a 2d plate in the ansys 12 mesher .afterwards i wanted to set boundary conditions for in-/outlet of my streaming channel with a gasket in it. the point is that i can't set boundary conditions for in-/and outlet. where can i define inlet/outlet(just edges, because of 2d)? hope anyone can help me... regards

December 1, 2009, 00:15	Named Selections.	#13
PSYMN Senior Member Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,663 Blog Entries: 1 Rep Power: 47	Named selections are the key to CFD boundary conditions in workbench. This is the same for 2D or 3D, except that you apply them to edges instead of faces. You can do it in DM or the ANSYS Meshing app. Use the edge selection tool to select the edge (such as the inlet), then right click and choose the option for creating a named selection... name the selection "INLET" and generate... Then repeat for other important ones. you don't need named selections for walls. Simon

December 2, 2009, 04:25		#14
dynamicdom New Member Join Date: Nov 2009 Posts: 8 Rep Power: 16	thank you two for your help!

December 23, 2009, 12:40		#15
just-right New Member - Join Date: Jul 2009 Posts: 14 Rep Power: 16	Fluid Flow CASE (FLUENT) in the WORKBENCH I tried the earlier mentioned tips, however I still get the error: PlugIn Error: No Valid Bodies Found I imported a sketch as *.CatPart (Catia V5) I generated a surface in DM. I tried it both with and without the imported sketch, both seem to fail. Any tips? Thanks in advance

December 23, 2009, 22:49	Maybe you don't have things set to 2D?	#16
PSYMN Senior Member Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,663 Blog Entries: 1 Rep Power: 47	Are you sure you are setup for 2D? Look up in the thread for info about how to do that...

December 24, 2009, 06:01		#17
just-right New Member - Join Date: Jul 2009 Posts: 14 Rep Power: 16	It seems the 2-D geometry should be placed on the XY plane. You can import an external geometry created on a different plane, just make sure you import it to the BASE plane XY. Grid creation in v12 isn't what it should have been though.

February 2, 2012, 23:13		#18
SeanQuallen New Member Sean Quallen Join Date: Dec 2011 Posts: 9 Rep Power: 14	Sorry to dig up an old thread, but I'm having this problem as well. I am using a 2D analysis and my surface/line bodies are in the x-y plane. In fact.. they open up in the meshing module and then I get the "PlugIn Error..." message. I can then close the message and continue on as if nothing ever happened. I carry on through the solver and I get results with it so I know it works, but I believe this is causing issues during a project wide update/parametric study. Any ideas? I'm using 13.0 and I have a very simple airfoil/farfield geometrical setup. I drew it up in DesignModeler and created surfaces. This is driving me nuts so any help would be well appreciated!! Last edited by SeanQuallen; February 2, 2012 at 23:29. Reason: clarification

February 4, 2012, 15:19		#19
PSYMN Senior Member Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,663 Blog Entries: 1 Rep Power: 47	I am guessing that the error is what is stopping your parametric study... You probably need to sort that out first... __________________ ----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey

August 20, 2012, 19:43		#20
jeff.freeman New Member Jeff Freeman Join Date: Mar 2012 Posts: 9 Rep Power: 14	Hi all, I'm new to Workbench (v13.0). I've spent hours trying to apply the suggestions made in this thread to my project, and still have problems. I hope somebody can explain what I'm doing wrong. I have a text file of point data that is formatted appropriately for the Concept > 3D Curve tool. All of my points are are in the XY plane, with the Z values equal to 0. Marking the "Merge Topology?" option to "Yes", this gives me a Curve1 and single Line Body. I then use the Concept > Surfaces From Edges tool to create a surface body from those edges. For some reason, I need to manually select all 9 edges from the Model View display. Selecting either the Line Body or the Curve1 from the Tree Outline does not work. Now I have a Surf2 and a Surface Body, which I set to be a Fluid. After Generating and saving this geometry, I close DM. Then I ensure that the Analysis Type is set to 2D. After all of this, I still get the "PlugIn Error: No valid bodies found for 2D Analysis in part Part" error. Any ideas why? The best reason I can imagine would involve DM only recognizing the 3D Curve as a 3d body, regardless of whether all the points are only in the XY plane. -Jeff Edit: I just tried suppressing the Line Body, and it worked! I loaded the geometry into Meshing and it didn't give me an error. Is what I did valid?

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