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

[ICEM] Interfacing between two domains

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 27, 2010, 12:07
Default Interfacing between two domains
  #1
Member
 
Sandeep
Join Date: Apr 2009
Location: Munich, Germany
Posts: 30
Rep Power: 16
sandeep_tu is on a distinguished road
Dear users,


I have two surface meshes (i dont have the geometry, have only meshes), loaded it into ICEM and trying to combine these two to have an interface for modelling CHT, can anyone help me how can i do this.

Meshes----A manikin(human body) and chair, have to combine these two meshes as a manikin sitting on the chair, so that we have an interface between human back, seat and chair.

Any one have an idea how can i do this in ICEM.


thanks
sandeep
sandeep_tu is offline   Reply With Quote

Old   May 28, 2010, 11:10
Default Questions...
  #2
Senior Member
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,663
Blog Entries: 1
Rep Power: 47
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
There isn't a single button that says "merge surface meshes with a tolerance", but there are lots of other "interactive" ways to handle this. To reduce this list down to the best suggestion, some Q&A.

Are they triangle meshes or quad meshes?

Do you need to keep both mesh layers separate (but aligned and connected) or can we just merge them together into one layer in the overlapping regions?

Can you post a screen shot?

Simon
PSYMN is offline   Reply With Quote

Old   May 29, 2010, 05:55
Default
  #3
Member
 
Sandeep
Join Date: Apr 2009
Location: Munich, Germany
Posts: 30
Rep Power: 16
sandeep_tu is on a distinguished road
Hi Simon,

thanks for reply.

1. they are triangular meshes (surface mesh)

2. I need to keep both mesh layers separate (but aligned and connected), so that i have interfacing at the connection between two parts.

images are attached have a look


regards
sandeep
Attached Images
File Type: jpg file.jpg (74.2 KB, 23 views)
File Type: jpg file1.jpg (74.1 KB, 24 views)
sandeep_tu is offline   Reply With Quote

Old   June 6, 2010, 09:23
Default Contact...
  #4
Senior Member
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,663
Blog Entries: 1
Rep Power: 47
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
I assume you intended to move them closer to the seats first...

Since the two meshes don't align at all now, and you want to keep both sides, this turns out to be a largely manual process. You could copy the mesh in the patch of the back that you want to touch... Offset the copy by a distance that puts it roughly at the chair back and increment the part name so you can look at it separately. Then project the copied mesh to the surface geometry of the seat. Then delete the seat elements in that area. Then use the create elements option to create a few elements between you copy of the back mesh and the surrounding chair mesh... You don't need to create all the elements, just enough to connect it (like a bridge out to the island). Then you can use the options to either "stich edges" or "Remesh from Edges" to fill in the rest of the gap... Then you will create line elements (RBE2, ridged body elements) between the nodes of the back and the copy...

The reason we have not automated this more is that most customers prefer to just use "contact" in situations like this. You can define contact interactively or using automatic (proximity) tools in ICEM CFD. Our output supports Abaqus, ANSYS, LS-Dyna, and Autodyn contact. I heard Nastran finally added support for contact, but we do not support it directly yet. However, you could just create the contact anyway and it will at least go out as different pids in the Nastran file and you can setup the contact definition between those PIDs manually.
PSYMN 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
Multiple Solid Domains - Interfaces Scott CFX 8 July 31, 2008 16:20
No Heat Transfer between two solid domains Mike ZH CFX 7 July 26, 2008 17:50
buoyancy in two separate domains DenizeN FLUENT 0 January 16, 2008 16:33
Multiple domains - buoy. ref. temp. setting Forrest CFX 8 February 22, 2006 14:43
interfacing different grid domains joseph CFX 3 March 29, 2002 03:10


All times are GMT -4. The time now is 04:17.