CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > CFX

IcemCFD 4CFX-How to fix domain

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 4, 2004, 12:04
Default IcemCFD 4CFX-How to fix domain
  #1
Ahmed
Guest
 
Posts: n/a
Hi all,

I am using IcemCFD 4.CFX to create mesh of my CAD geometry. Due to the complexity of this geometry I was almost unsuccessful using CFX-Build. With IcemCFD 4 CFX, the mesh generation worked very good. I imported this geometry to CFX-Pre but the domains are not the same as I wanted. I mean, the geometry looks the same. But I want to have a domain and a sub-domain. But the automatically created (created by IcemCFD 4 CFX) domains are much different from the one I want. I am a new user in IcemCFD 4 CFX. I have experience in IcemCFD. I want to know how to define domains in IcemCFD 4 CFX. In CFX-Build, we create solids (B-rep for example) by selecting surfaces and then give identity to this solids in the domain region. When this geometry is imported in Pre, it works very good. Can someone tell me how it can be done in IcemCFD 4 CFX. I mean, the sequence followed in CFX-Build, how is it done in IemCFD 4 CFX. Thanks in advance.

Azeez
  Reply With Quote

Old   March 4, 2004, 16:29
Default Re: IcemCFD 4CFX-How to fix domain
  #2
nic
Guest
 
Posts: n/a
Solids should be automatically built when u import your geometry u have to make sure that you have a defined a material point. Check the tutorials

  Reply With Quote

Old   March 4, 2004, 18:13
Default Re: IcemCFD 4CFX-How to fix domain
  #3
derrek
Guest
 
Posts: n/a
I think you want to define more than one material point to specify the different domains.

Derrek
  Reply With Quote

Old   March 6, 2004, 01:13
Default Re: IcemCFD 4CFX-How to fix domain
  #4
Glenn Horrocks
Guest
 
Posts: n/a
Alternatively you can change the family of the volume elements after meshing to generate the seperate mesh regions. All depends on what you are trying to do.

Glenn
  Reply With Quote

Old   March 6, 2004, 16:34
Default Re: IcemCFD 4CFX-How to fix domain
  #5
deLuther
Guest
 
Posts: n/a
Maybe if you have several(two or more) different materials you must perform floodfill operation. In my case if I create two materials, every time I get mesh covered entire regions, but only for one material. After performing floodfill elements was divided into different families according to material points like I manually assign elements to families.
  Reply With Quote

Old   March 8, 2004, 23:00
Default Re: IcemCFD 4CFX-How to fix domain
  #6
Oliver
Guest
 
Posts: n/a
The current version of ICEMCFD 4 CFX is no better than CFX build for its tet mesh generation. ICEM can create and clean the topology of the complex geometry in a short time, which is excellent.

However, it does have some serious bugs on the surface mesh generator. If your elements is larger than one of your small surface which has high curvature, then you will most likely get some convergence problems when solving it in CFX.

I hope the new version will improve this very soon.

Ta, Oliver
  Reply With Quote

Old   March 9, 2004, 19:38
Default Re: IcemCFD 4CFX-How to fix domain
  #7
Glenn Horrocks
Guest
 
Posts: n/a
Hi Oliver,

I agree the ICEM CFD 4CFX is strong in taking dirty CAD models and generating good meshes from them.

I can't see how the ICEM surface mesh generator is a problem. If the surface mesh has an element which sticks out and does not blend with the surrounding elements the solver will have convergence problems regardless of what the source of the mesh is. Sounds like you need to look at the way you are specifying and generating your meshes.

Regards, Glenn
  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
Vertical Axis Wind Turbine Rotating Domain Problems TWaung CFX 4 May 1, 2012 03:14
CFX domain comparison Kiat110616 CFX 4 April 3, 2011 22:43
Domain Imbalance HMR CFX 3 March 6, 2011 21:10
CFX Solver Memory Error mike CFX 1 March 19, 2008 08:22
defining a domain of control in ICEMCFD khair Main CFD Forum 0 December 25, 2007 15:22


All times are GMT -4. The time now is 19:54.