# Draw curve by joining points

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• Last Post 28 August 2018
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RajuMath posted this 05 August 2018

I would like to draw the geometry showing in the picture by joining the points in Design Modeler. I am facing problem to draw the lower part of the converter (Marking area in the picture). How can I draw this portion by joining two or three points?

Attached Files

peteroznewman posted this 05 August 2018

Hello Raju,

Draw a Rectangle.

Draw an Arc by 3 Points

Trim away the line and add a coincident constraint to the end points and center point.

Draw an Arc by Tangent

Add Tangency constraint and trim away the corner.

Regards,

Peter

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RajuMath posted this 06 August 2018

Hi Peter,

To draw the geometry, I have select the coordinates by creating points. Then creating lines by joining two points. Problem is that, after connecting all points, when creating a surface from the sketches to create the area of the geometry, the geometry is not selecting. What should I do to create the surface?

Raju.

rwoolhou posted this 06 August 2018

Assuming you have a sealed loop, look in the Concept tools for create face (surface?) from sketch.  Note, it will create the face from the outer loop of edges so if you want multiple faces you'll need multiple sketches.

Cheers,
Rob

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peteroznewman posted this 06 August 2018

Hello Raju,

You say area of the geometry. I assume you want a 2D cross section and not a 3D solid of revolution. One option is to make the 3D solid, then slice it to get the face you want. The other option is to create an offset in a new sketch.

Then use Concept, Surfaces from Sketches and create two surfaces.

Then use Boolean Subtract, and use the inside surface as the tool and the outside surface as the target.

You can even create a slice on the inside surface to represent the contents.

If you want a 3D solid, I can write that up. If you get stuck doing any of this, I can make a video.

Regards,

Peter

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RajuMath posted this 07 August 2018

Hi Peter,

Thank you so much. I am trying to do this. I will inform you if I get stuck.

Regards,

Raju.

RajuMath posted this 13 August 2018

Hi Peter,

I have drawn the geometry by creating points>creating lines (joining by points)>Convert edges to surfaces.

For meshing, I would like to subdivide the geometry into parts (red marked lines) and want to control the meshing. How can I do this?

I would like to create rectangular mesh with equal size. How can I do this? I don't want to any triangular mesh. How to remove them?

I am taking 1000 number of divisions in edges but this does not affects on meshing. How can I solve it?

Regards,

Raju.

peteroznewman posted this 13 August 2018

Hi Raju,

You need to create five planes and insert five slice operations. The XY plane of the new planes define where the slice goes.

Then you will have 9 parts and 9 bodies. In DesignModeler, select the 9 bodies at the bottom of the Outline and RMB to select Form New Part. Then you will have 1 part and 9 bodies.  This is a multibody part and they will have Shared Topology, meaning the bodies share a common edge. When the mesher meshes these bodies, they will share common nodes at the common edges. There is no need for contact to connect the bodies.

In Meshing, add the Face Mesh control on all faces. That forces quadratic only elements, since each face has exactly four sides. Go to the Mesh Details window and enter the default size for the elements. That should make all the elements about the same size.

Regards,

Peter

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RajuMath posted this 14 August 2018

Hi Peter,

Thank you for your reply. I am trying but not getting the perfect mesh. It will be easy for me to get a video about meshing and slicing.

I am subdividing the geometry by Facesplit. The domain is showing the split part but body is not spliting (2 body- line body and surface body remains constant).

Thanking you,

Raju.

peteroznewman posted this 14 August 2018

If you Slice with a plane and use multibody part, and Face Meshing control, you will get what you want.

If you don't, Attach a Workbench Project Archive and I will look at it.

RajuMath posted this 15 August 2018

Go the link to open the file.  Workbench_Archive

peteroznewman posted this 15 August 2018

Hey Raju,

I have your file and am slicing it up. You said you want no triangles, but that will not be advisable with this triangular point in the center.

You can also see your Face Split missed the vertex in the corners by a small margin, so I will redo that.

After slicing, there are 2 triangles in the mesh.

You said in your other post that you are on ANSYS 18 but do you mean 18.0 or 18.2?

If I do this in 18.2 you won't be open it in 18.0 so please reply with your exact version.

Regards,

Peter

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RajuMath posted this 15 August 2018

Hi Peter,

Thank you so much for the work. I am using ANSYS 18.2.

Regards,

Raju

peteroznewman posted this 15 August 2018

Here is an ANSYS 18.2 archive sliced up.

Attached Files

RajuMath posted this 15 August 2018

Although there are two triangular mesh is formed, seems good meshing. Did you do it only by Face meshing (all edge meshing seems disable)?

How do you selected PF Point and Plane Normal. While I am doing, Base point selected from Vertex and Normal defined by 3D edge. It is creating problem meshing.

Regards,

Raju.

peteroznewman posted this 15 August 2018

The item to select for Normal Defined by is either the ZX Plane or YZ Plane at the top of the outline to make a horizontal or vertical slice respectively. When you filter on Vertex and pick a PF point off the graphics window for the Base Point, it will use the PF Point.

Yes, all Face Meshing and just setting the Max Face Size in the Mesh Details window in the Sizing branch.

RajuMath posted this 16 August 2018

Hi Peter,

I am failed to do it. Actually I am not finding the options. Could you sent me a image or instructions to do that?

peteroznewman posted this 16 August 2018

You can show your appreciation by clicking Like below the posts that are helpful.

Regards,

Peter

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RajuMath posted this 16 August 2018

Thanks a lot Peter.

RajuMath posted this 27 August 2018

Hi Peter,

Now facing another problem. After slicing, I am getting good quality mesh. But while I am opening model setup, I am not getting walls that fixed in mesh. Fluent is creating a lots of wall and interfaces which is not expected. That is creating problem for my solution. Sometimes can not initialize the solution. What can I do now? I attach here the file for your checking. Please have a look my File.

Regards,

Raju

peteroznewman posted this 27 August 2018

Hi Raju,

I can't look at your file until later.  I wanted to ask if you have used Form New Part to put all the pieces that were sliced into a single part. Once you do that, you will have a connected mesh across all the bodies, with no need for contact being defined in Meshing. By deleting any contacts and having Shared Topology from the single multibody part, you should eliminate all the unnecessary walls and interfaces in Fluent.

Here is an example of using Form New Part and benefit from Shared Topology.  See if that helps and reply with your results.

Regards,

Peter

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RajuMath posted this 27 August 2018

Hi Peter, I have put all sliced bodies into two new part but facing the same problem. Fluent cann't delete the Unnecessarily walls and interfaces.

Raju.

peteroznewman posted this 27 August 2018

Hi Raju,

Why are there two parts?  I expected you to put all the bodies into one part.  Having two parts is going to leave the need for an interface.

If you drag a new Fluent model onto the Meshing item of the block where the two new parts are, does that new model have fewer walls and interfaces?

You should create a new discussion and put it in the Fluid Mechanics section, with a lot of images to show what you have in DM, in Meshing and in Fluent so the experts can help you. I am not a Fluent expert.

Regards,

Peter

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RajuMath posted this 28 August 2018

Hi Peter,

Thank you. Merging all sliding body into one part, now getting results.

Regards,

Raju.

peteroznewman posted this 28 August 2018

Hi Raju,

That's great news!

You can show your appreciation by clicking Like below the posts that are helpful.

Regards,

Peter