CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Community Contributions

[swiftBlock/swiftSnap] How do you create your 2D geometries in Blender?

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 1, 2014, 08:25
Default How do you create your 2D geometries in Blender?
  #1
Member
 
Join Date: Aug 2013
Posts: 60
Rep Power: 12
sur4j is on a distinguished road
I am trying to use an existing 2D CAD drawing imported into Blender to create a 3D model so that I can use swiftBlock to create the blockMeshDict for OpenFOAM. From tutorials I have seen that the general way of doing this is to create faces made up of 3-4 points (http://www.youtube.com/watch?v=uLmlrc3vb1s) and then extrude the component however in my case there are a lot of points and will take a long time to create the required number of faces. Could anyone please let me know if this is the method you also use for your 2D cases or is there a much faster way of doing this?

I asked about this on the Blender forum but I have noticed that the majority of the Blender users "sculpt" their models rather than create from 2D drawings therefore, I was not able to get much help.
sur4j is offline   Reply With Quote

Old   January 2, 2014, 17:09
Default
  #2
Member
 
Join Date: Aug 2013
Posts: 60
Rep Power: 12
sur4j is on a distinguished road
I have managed to create simpler geometries without arcs and it worked fine the problems occur when I try to create it with the arcs. My other idea was to make the arc a straight line in blender and then manually change it to an arc in the created blockMeshDict file, however this did not work either as I could not create the faces using only hexahedrals in blender.

I am really struggling, could someone please help me with this by showing or explaining to me what procedure I should use to create the geometry? If a simpler alternative to Blender/swiftBlock exists for this geometry which is compatable with the solidMechanics solvers in OpenFOAM please let me know.

Last edited by sur4j; January 3, 2014 at 15:48.
sur4j is offline   Reply With Quote

Old   January 4, 2014, 17:31
Default
  #3
Member
 
Join Date: Aug 2013
Posts: 60
Rep Power: 12
sur4j is on a distinguished road
Two solutions I found to this problem for anyone who encounters them in the future:
  • For complicated geometries with many vertices I have used the "Grid Fill" tool, it generated all hexahederal mesh automatically and took 2 minutes, this can be adjusted and offset if the "F6" key is pressed directly after using the function.
  • However, this tool does not work for all geometries and can have strange results on some where the mesh is very fine at some points and very coarse at others, to create a more even mesh I manually created the faces. For the arcs I first had to reduce the number of vertices, this was done by either: (1) Using the checker deselect, setting it to "2" and dissolving the vertices OR (2) using the remove doubles function to delete the additional vertices. The vertices were then spaced out evenly using the "space" function and the faces were created.
I hope this helps someone as I faced many problems with this, if anyone has any other method for generating 2D geometries inside of blender which are compatible with swiftBlock then please let me know.
sur4j is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
create the file *.foam phongstar OpenFOAM 12 October 14, 2018 19:06
SonicFoam tuto nacaAirfoil steadystate Dorian1504 OpenFOAM Running, Solving & CFD 10 October 11, 2017 18:05
[gmsh] How to create a 3D volume mesh using a existing surface mesh?! RobertHB Mesh Generation & Pre-Processing 0 July 20, 2017 09:12
[ICEM] how to create a 2d tri mesh with quad mesh in the boundary layer seal2013 ANSYS Meshing & Geometry 3 October 6, 2013 17:09
Actuator disk model audrich FLUENT 0 September 21, 2009 08:06


All times are GMT -4. The time now is 02:25.