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

2D primitive region

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 15, 2012, 07:18
Default 2D primitive region
  #1
New Member
 
Tayyaba
Join Date: Jul 2012
Posts: 4
Rep Power: 5
Tayyaba is on a distinguished road
Hi,

I want to calculate the resistance of DTMB-5415 Combatant Hull. I have created mesh in Gambit( l have attached a boundary layer to the hull). I want to use CFX for simulations.The mesh in CFX-pre shows a inside the domain which I have not created at all.

I tried different mesh size to get rid of this problem but but all efforts went in vain.

Now i don't know how to cater this problem?

Please help me to solve this problem.

Waiting for a kind response.

Regards,
Attached Images
File Type: jpg DTMB-5415 Hull Mesh.jpg (74.9 KB, 17 views)
File Type: jpg 2 DTMB-5415 Hull Mesh.jpg (96.5 KB, 11 views)
File Type: jpg 2D primitive region.jpg (26.3 KB, 19 views)
File Type: jpg 2D Primitive.jpg (21.2 KB, 13 views)
File Type: jpg Primitive 2D Region.jpg (20.6 KB, 11 views)
Tayyaba is offline   Reply With Quote

Old   August 15, 2012, 07:57
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,820
Rep Power: 85
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
What do you mean by "The mesh in CFX-pre shows a inside the domain which I have not created at all."

You will need a good inflation mesh on your vessel to get accurate drag numbers.
ghorrocks is offline   Reply With Quote

Old   August 15, 2012, 08:21
Default
  #3
New Member
 
Tayyaba
Join Date: Jul 2012
Posts: 4
Rep Power: 5
Tayyaba is on a distinguished road
Sorry, I made a typing error.

I Want to Say

"The mesh in CFX-pre shows a 2D primitive region inside the domain which I have not created at all."

Sorry once again
Tayyaba is offline   Reply With Quote

Old   August 15, 2012, 18:35
Default
  #4
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,820
Rep Power: 85
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
These regions usually come about because somewhere in your meshing system it have triggered an edge detection threshold which then assumes it is a different boundary.

You should be able to combine both of these regions into one in CFX-Pre if you wish to continue, but you should fix the root cause of the problem if you want accurate answers. The root cause is your mesh is not fine enough to resolve the geometry in this region. Need a finer mesh in that region.
ghorrocks 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
How to ignore some 2D primitive region in CFX-Pre KK CFX 4 April 15, 2014 11:05
Using starToFoam clo OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 33 September 26, 2012 04:04
StarToFoam error Kart OpenFOAM Meshing & Mesh Conversion 1 February 4, 2010 05:38
Trimmed cell and embedded refinement mesh conversion issues michele OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 2 July 15, 2005 04:15
Import gmsh msh to Foam adorean Open Source Meshers: Gmsh, Netgen, CGNS, ... 24 April 27, 2005 08:19


All times are GMT -4. The time now is 03:50.