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

Design Modeler - need to insert baffle into flowfield

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 22, 2011, 17:45
Smile Design Modeler - need to insert baffle into flowfield
  #1
New Member
 
PS
Join Date: Aug 2011
Posts: 13
Rep Power: 5
pstreufert is on a distinguished road
Hi all - very simple problem. I have a flowfield (annular flow between 2 concentric pipes) that I'm running using symmetry, so only 1/2 the pipes, lengthwise. Now I need to put baffles in them to calculate the change in the heat transfer from a hot inner pipe wall. I'm using Design Modeler - new to this program - and need to figure out how to do this. I've tried a number of things that look good in the mesher, but the baffles don't show up in Fluent.

I'm baffled!

Thanks!

Patty
pstreufert is offline   Reply With Quote

Old   August 23, 2011, 09:55
Default More info
  #2
New Member
 
PS
Join Date: Aug 2011
Posts: 13
Rep Power: 5
pstreufert is on a distinguished road
I tried in Design Modeler to model the baffles as solids with a thickness, then extruded the tube using "freeze" - I thought it worked and Fluent sees the solids (I set them as walls rather than internal), but the flow still goes right through the walls rather than around them. I'm attaching a picture (if that works)
Attached Images
File Type: jpg picture of baffles.jpg (25.7 KB, 76 views)
pstreufert is offline   Reply With Quote

Old   August 28, 2011, 16:16
Default
  #3
Senior Member
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,662
Blog Entries: 1
Rep Power: 35
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
Sorry it took me so long to get here...

In ANSYS Meshing, it meshes each solids separately... When you added the baffles as frozen solids, it thought you were adding separate parts, so it meshed them separately... The mesh from the tube doesn't include the baffles at all. It is just a mesh of the tube. The baffle mesh is intersecting/overlapping but not interacting...

What you needed to do was add the baffles by "removing" material from the tube... Don't add frozen, just change the pulldown so it doesn't say "add material".

Best regards,

Simon
__________________
-----------------------------------------
Please help guide development at ANSYS by filling in these surveys

Public ANSYS ICEM CFD Users Survey

This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)...

CFD Online Users Survey
PSYMN is offline   Reply With Quote

Old   August 31, 2011, 18:05
Default
  #4
New Member
 
PS
Join Date: Aug 2011
Posts: 13
Rep Power: 5
pstreufert is on a distinguished road
Thanks for responding - I did get the model working by generating the baffles with an inner and outer wall, capping the ends and using the "Fill" tool to generate a fluid volume. Now I have to learn how the efficiently use the meshing tool in Workbench!
pstreufert 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
Importing Points in Design Modeler danh ANSYS Meshing & Geometry 5 March 30, 2015 10:45
Design Modeler not working tan v ANSYS 0 July 7, 2011 02:43
[Other] Connecting 3D bodies in Ansys Design Modeler chipper ANSYS Meshing & Geometry 3 June 19, 2010 09:46
Baffle in the cubical domain in design modeler eslam CFX 5 October 15, 2007 10:28
Info: Short Course On Thermal Design of Electronic Equipment Arnold Free Main CFD Forum 0 August 10, 1999 10:18


All times are GMT -4. The time now is 01:23.