CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Meshing Format & General Technical

3D Meshing Ideas?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 20, 2011, 16:16
Default [Task] Hotgas nozzle with Pointview
  #1
New Member
 
Patrick Pazour
Join Date: Nov 2011
Posts: 9
Rep Power: 4
Artex85 is on a distinguished road
Dear Forum Users!

After completing some simple meshing tasks with gmsh (2.2.6) and discretizer, I will do some more realistic meshing cases. I have to use this old gmsh version, otherwise there is no chance for me to convert it via gmshToFoam (OpenFOAM 1.5-Dev).

The next case will be a more realistic variant of my hotgas nozzle (inert gas). We have different wall temperatures and an inlet pipe, which is normal to the main pipe. Later on, I wanna take a turbulent heat transfer solver.

For a better imagination, I attached two images of the 3D part (ProEngineer). For the first try I exported it as a .stl

The colored surfaces represent the intended boundary layers:
  • green - inlet
  • yellow - outlet
  • red - hot walls
  • blue - cold walls
Is there any need, to define the surfaces in the .stl file directly, or is there a possibility to set it up later on?

My experience with snappyHexMesh is ... not the best. I dont know how to define the boundary layers and there are problems with "sharp" edges. Maybe there is a way with the discretizer...

Importing the .stl in gmsh 2.2.6 works really good, but I dont have an idea how to create the 3D mesh with this version.

So, do you have some ideas, how to get a mesh out of the 3D model for the upcoming case.

Thanks in advance

Edit: Just work around with Pointwise and updated the 3D model to be more ... fluent
I split the geometry in a rear part with the intersection, and a front part with the nozzle, if someone have experience with this kind of meshing, help is welcome
Attached Images
File Type: jpg hg_duese_01.jpg (22.8 KB, 30 views)
File Type: jpg hg_duese_schnitt.jpg (18.5 KB, 20 views)

Last edited by Artex85; December 22, 2011 at 15:17. Reason: Another Mesher, 3D Model update
Artex85 is offline   Reply With Quote

Old   December 28, 2011, 08:14
Lightbulb Its going on
  #2
New Member
 
Patrick Pazour
Join Date: Nov 2011
Posts: 9
Rep Power: 4
Artex85 is on a distinguished road
Nozzle Version 2 - see last post:
  • Unstructured (tet) mesh is done
parts of Nozzle Version 3 - or the much more realistic one
  • Structured (hex) raw mesh is done, solving with icoFoam is done
Happy New Year
Attached Images
File Type: png Unbenannt.png (21.9 KB, 22 views)

Last edited by Artex85; January 5, 2012 at 03:45. Reason: case update
Artex85 is offline   Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[ANSYS Meshing] Migrating from GAMBIT to ANSYS Meshing David-CFD ANSYS Meshing & Geometry 1 April 1, 2011 05:22
Best Meshing scheme for Cylinder Nutrex Main CFD Forum 4 July 29, 2008 11:03
Meshing locks workbench window. andy2o CFX 0 February 1, 2008 05:01
Singularity of grid?Volume meshing vs face meshing Ken Main CFD Forum 0 September 4, 2003 11:09
Volume Meshing & Face Meshing? singularity of grid ken FLUENT 0 September 4, 2003 11:08


All times are GMT -4. The time now is 16:22.