CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

[ICEM] How to mesh 2 cylinders that are perpendicular?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 4, 2012, 10:50
Default How to mesh 2 cylinders that are perpendicular?
  #1
Senior Member
 
Sören
Join Date: Mar 2012
Posts: 102
Rep Power: 4
despaired student is on a distinguished road
Hi,

I've a "simple" question. How to best mesh 2 cylinders that are perpendicular towards eachother?

Condition is that the top of the one cylinder is in line with the other cylinder.
A .tin file is attached.


Kind regards
Attached Files
File Type: zip example.zip (63.2 KB, 17 views)
despaired student is offline   Reply With Quote

Old   June 6, 2012, 11:20
Default
  #2
Senior Member
 
AB
Join Date: Sep 2009
Location: France
Posts: 323
Rep Power: 11
BrolY will become famous soon enough
I guess you plan to use blocking ?

Once you have done the splits to capture the footprint of the perpendicular tube, you can use the option blocking -> create block -> extrude face and select "fixed distance" for the method.
It's pretty easy to use.
BrolY is offline   Reply With Quote

Old   June 6, 2012, 14:31
Default
  #3
Senior Member
 
Sören
Join Date: Mar 2012
Posts: 102
Rep Power: 4
despaired student is on a distinguished road
Thank you - I'll try this.
despaired student is offline   Reply With Quote

Old   June 7, 2012, 03:43
Default
  #4
Senior Member
 
AB
Join Date: Sep 2009
Location: France
Posts: 323
Rep Power: 11
BrolY will become famous soon enough
I have attached an example with your project.
Attached Files
File Type: zip PERPENDICULAR_TUBE.zip (96.9 KB, 11 views)
BrolY is offline   Reply With Quote

Old   June 7, 2012, 07:53
Default
  #5
Senior Member
 
Sören
Join Date: Mar 2012
Posts: 102
Rep Power: 4
despaired student is on a distinguished road
I tried it but it didn't work ...yet..
Nevertheless thank you again for helping me.


The problem is the point where the cricle of the tube touches the top respectively the bottom curve that describes the circumference. Here one must decide whether to associate the edge to one of these curves and that results in an incorrect mesh here.

My idea was to make a small layer on top respectively on the bottom.
This means I have the edges of layer 1 to associate to the top-curve. In layer 2 I have curves that encircle along the surface of the main-cylinder and I create a "hole" where I connect the block for the tube. This block is smaller than the second layer but by associate edge to curve I mesch the perpendicular tube correctly.
But by doing so the cells below and above my "tube-block" are squeezed/compressed. The cells at the top/bottom are so heavyly compressed that here the det 3x3x3 quality-criterion is at 0.1.
despaired student is offline   Reply With Quote

Old   June 7, 2012, 09:21
Default
  #6
Senior Member
 
AB
Join Date: Sep 2009
Location: France
Posts: 323
Rep Power: 11
BrolY will become famous soon enough
You need to use 1/4 of O-grid to sort this out.
I have attached a project with an example.
But with this kind of geometry, dont't expect to have a good quality :S
Attached Files
File Type: zip tin.zip (61.5 KB, 12 views)
File Type: zip blk.zip (38.7 KB, 9 views)
BrolY is offline   Reply With Quote

Old   June 7, 2012, 10:07
Default
  #7
Senior Member
 
Sören
Join Date: Mar 2012
Posts: 102
Rep Power: 4
despaired student is on a distinguished road
...yes, O-grid and Y-Grid is a good idea, I think, but I couldn't get good results. Maybe an tetra-Mesh or an inflow/outflow profile at the connection-area of cylinder and pipes instead of the pipes...

Thank you for your try!
despaired student 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
[ICEM] Generating Mesh for STL Car in Windtunnel Simulation tommymoose ANSYS Meshing & Geometry 48 April 15, 2013 04:24
engrid -> save as .stl with boundarie codes Zymon enGrid 31 August 29, 2011 13:40
fluent add additional zones for the mesh file SSL FLUENT 2 January 26, 2008 11:55
basic of mesh refinement arya CFX 4 June 19, 2007 12:21
Mesh Mignard FLUENT 2 March 22, 2000 05:12


All times are GMT -4. The time now is 19:12.