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

[GAMBIT] 3D mesh for pipe intersection

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 26, 2010, 19:25
Question 3D mesh for pipe intersection
  #1
Member
 
pranab_jha's Avatar
 
Pranab N Jha
Join Date: Nov 2009
Location: Houston, TX
Posts: 83
Rep Power: 7
pranab_jha is on a distinguished road
Hello everyone,
I am trying to mesh a pipe intersection as shown in the fig attached. I am not able to mesh the main pipe using cooper as gambit tells me that the face at the intersection is not mappable or not a correct source face. Also, if I create only a single volume by 'intersection' of the two pipes, how will I mesh the volume in the first place? I want to keep structured mesh (hex).

I first created two volumes (one for each pipe). I kept the intersecting face between the two pipes so that I could define the volumes (my plan is to define this intersection face with internal BC). Then I tried to mesh inlet face of the bigger (main) pipe and apply 'Cooper' in the axial direction and Gambit never took the spacing that I specified.
How to mesh the intersection and how can I control my mesh density in the direction I want?


My main aim is to study the flow of two different fluid phases in the main pipe. So I will have gas inflow from the smaller pipe and will run in Fluent using VOF. I have already done some simple runs in two-phase with single pipe having split inlet.

Can somebody help me with my problem?
Thanks in advance.
Pranab
Attached Images
File Type: jpg 1234.jpg (18.3 KB, 182 views)
pranab_jha is offline   Reply With Quote

Old   May 27, 2010, 01:48
Default
  #2
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,964
Rep Power: 30
-mAx- will become famous soon enough
If you need a full hexa mesh, then you have to decompose your domain
check gambit tutorial: 7. MODELING FLOW IN A TANK (especially step 5)
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is offline   Reply With Quote

Old   May 27, 2010, 09:59
Default
  #3
Member
 
pranab_jha's Avatar
 
Pranab N Jha
Join Date: Nov 2009
Location: Houston, TX
Posts: 83
Rep Power: 7
pranab_jha is on a distinguished road
Max,
I will check it out and get back.
pranab_jha is offline   Reply With Quote

Old   May 28, 2010, 01:33
Thumbs up Got it!
  #4
Member
 
pranab_jha's Avatar
 
Pranab N Jha
Join Date: Nov 2009
Location: Houston, TX
Posts: 83
Rep Power: 7
pranab_jha is on a distinguished road
Hi,
I got the mesh I wanted. Well not exactly, but yes I do know now how to do it. The tutorial was helpful and I also searched a pdf on the net. My mesh looks something like attached below. Domain decomposition is the key, so that I could used cooper to project once I get the source faces correct.
Thanks,
Pranab
Attached Images
File Type: jpg 341trttg.jpg (79.0 KB, 177 views)
pranab_jha is offline   Reply With Quote

Reply

Tags
mesh generation, pipebranch

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
Dynamic Mesh Problem. Tom Clark FLUENT 9 July 7, 2010 07:56
virtual geometry richard FLUENT 4 January 7, 2009 06:16
2d irregular grid Remy Main CFD Forum 1 December 22, 2008 05:49
basic of mesh refinement arya CFX 4 June 19, 2007 12:21
General questions on grid-based computing Adrin Gharakhani Main CFD Forum 21 June 5, 2000 13:47


All times are GMT -4. The time now is 05:15.