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

[GAMBIT] urgent : solid bodies in a cylinder

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 9, 2010, 10:27
Post urgent : solid bodies in a cylinder
  #1
New Member
 
Join Date: Jul 2010
Posts: 22
Rep Power: 5
Mansureh is on a distinguished road
Hi every body
I'm trying to simulate the flow field in a cylinder, containing some spherical solid bodies with a random arrangement . can anybody tell me what will be the true strategy for creating the geometry?

1. subtracting the volume of spheres from the volume of the cylinder that results to a mesh with high skewness

2. meshing entire of the cylinder , considering the spheres as solid domain and meshing them separately, i tried it , but after postprocessing, I saw the fluid passes through the inside of solid bodies whereas the fluid should pass over the spheres.

if none of them is the true, so what will be the true way for creating and meshing the geometry that result to a true flow field?

kind regards
Mansureh is offline   Reply With Quote

Old   October 9, 2010, 11:04
Default
  #2
Member
 
Raghav
Join Date: Jul 2010
Location: India, Karnataka
Posts: 40
Rep Power: 7
raghav is on a distinguished road
Try defining the Boundary Condition for spheres as "wall".
raghav is offline   Reply With Quote

Old   October 9, 2010, 14:28
Post
  #3
New Member
 
Join Date: Jul 2010
Posts: 22
Rep Power: 5
Mansureh is on a distinguished road
thanks for reply.
I know, but nonetheless the flow passes through the spheres, because the cylinder have mesh elements inside the spheres.
Mansureh is offline   Reply With Quote

Old   October 9, 2010, 18:31
Default
  #4
Member
 
Raghav
Join Date: Jul 2010
Location: India, Karnataka
Posts: 40
Rep Power: 7
raghav is on a distinguished road
I am facing the above problem while i import the mesh to CFX after meshing my geometry using OCTREE.

You may try Blocking the whole geometry and then remove the blocks inside the spheres. This way of doing might help.

Last edited by raghav; October 10, 2010 at 00:43.
raghav is offline   Reply With Quote

Old   October 10, 2010, 16:04
Post
  #5
New Member
 
Join Date: Jul 2010
Posts: 22
Rep Power: 5
Mansureh is on a distinguished road
hi raghav
how can i do the blocking in the fluent?
Mansureh is offline   Reply With Quote

Old   October 11, 2010, 02:56
Default
  #6
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,786
Rep Power: 28
-mAx- will become famous soon enough
follow your first point (substracting bodies from the cylinder).
Then you need to find what is causing high skewness.
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- 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
flow over a cylinder urgent! kevin FLUENT 7 June 8, 2006 01:19
urgent: heat transfer fluid to solid marco FLUENT 1 October 28, 2005 22:17
Help in Meshing Solid Cylinder in Gambit. Andy Singh FLUENT 5 August 31, 2004 07:31
CFX4.3 -build analysis form Chie Min CFX 5 July 12, 2001 23:19
Heating of a solid cylinder with internal heat generation Sriram Popuri Main CFD Forum 6 July 13, 1999 18:09


All times are GMT -4. The time now is 05:33.