CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Gambit Meshing of stirred mixing tank

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 13, 2011, 12:03
Default Gambit Meshing of stirred mixing tank
  #1
New Member
 
Shady ENANY
Join Date: May 2011
Location: Leicester
Posts: 24
Rep Power: 14
shadyenany is on a distinguished road
Send a message via Skype™ to shadyenany
Hi Few people,

Currently I am working on my project which is modelling of flow patterns in membrane bio-reactor, simply I've drawn a cuboid tank and there are 4 membranes with a stirrer ( rotating mixer) placed inside ,on the base. and I've imported it successfully into the Gambit 3.2.16. the problem is within the geometry decomposition (operation or geometry command button) so I can not build the solid faces however I chose all the edges and faces successfully but it gave me an error saying that can't connect the edges in the wireframe. and If i run the meshing directly it doesn't do the mesh for the whole body but for the base and 1 face only out of the four boundary faces and so can't be imported after in fluent.

Any Ideas or Help Please?!!!!

I'd be very thankful if u can support any dummy tutorials for mixing tank ( multiphase)

Kind Regards;
S.E.
shadyenany is offline   Reply With Quote

Old   September 14, 2011, 02:40
Default
  #2
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 3,297
Rep Power: 41
-mAx- will become famous soon enough
tutorials are here: http://my.fit.edu/itresources/manual...uide/tgtoc.htm

Regarding your problem, did you get your flow domain, or do you still have the solid domain?

Pictures and/or sketchs are welcomed for good understanding
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is online now   Reply With Quote

Old   September 14, 2011, 16:49
Default
  #3
New Member
 
Shady ENANY
Join Date: May 2011
Location: Leicester
Posts: 24
Rep Power: 14
shadyenany is on a distinguished road
Send a message via Skype™ to shadyenany
Quote:
Originally Posted by -mAx- View Post
tutorials are here: http://my.fit.edu/itresources/manual...uide/tgtoc.htm

Regarding your problem, did you get your flow domain, or do you still have the solid domain?

Pictures and/or sketchs are welcomed for good understanding

Many thanks for your kind reply, and referring to it kindly check the attachment files. I've posted all the necessary files you may need. you'll find there different views for the 3d CAD drawing that clarify the geometry,

Actually the meshing I've done is working properly now so I can import it successfully without any problems in Fluent software, however as you will see in the meshing picture that neither all the inner faces nor the base of the geometry are meshed though they are involved in the picked faces and edges!!! that is the main problem am facing at the moment. Actually I'm thinking of simplifying the geometry however i wouldn't do that until I receive your reply.

I'm not well experienced with Gambit and Fluent since it is my first time to use them, so I'd like to ask you few questions

1- Is it normal ,when I import a Geometry like this, to find 403 edges and 191 Faces?!
2- If yes, how can I group faces and label them as a ' wall 1' for example to make it easy to use them after during meshing?
3- Importing CAD files in Gambit accepts IGES and STEP, in your opinion which is better to import and why?!

http://hotfile.com/dl/129808052/821c7d8/Tank.rar.html
shadyenany is offline   Reply With Quote

Old   September 15, 2011, 04:25
Default
  #4
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 3,297
Rep Power: 41
-mAx- will become famous soon enough
1- you have an option with stand alone edge or whatever
2- As you export your mesh, Gambit will automatically groups all outer faces without defined BC as wall >> so don t need to define them as wall
3-definitively STEP
4- I am in vacation
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is online now   Reply With Quote

Old   September 15, 2011, 13:13
Default
  #5
New Member
 
Shady ENANY
Join Date: May 2011
Location: Leicester
Posts: 24
Rep Power: 14
shadyenany is on a distinguished road
Send a message via Skype™ to shadyenany
Quote:
Originally Posted by -mAx- View Post
1- you have an option with stand alone edge or whatever
2- As you export your mesh, Gambit will automatically groups all outer faces without defined BC as wall >> so don t need to define them as wall
3-definitively STEP
4- I am in vacation
Ok that's fine I'll try this concerning number 1, however I need to ask you one more question. when I am specifying the boundary conditions after meshing. what shall I define the stirrer (mixer or impeller) as? should I define it as fan? axis? or what? as well as the motor body in the bottom of the tank?

and also the membranes what shall i define them as? inlet vent? mass flow inlet?

Thanks Max
shadyenany is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Gambit - meshing over airfoil wrapping (?) problem JFDC FLUENT 1 July 11, 2011 06:59
Gambit meshing error jx FLUENT 11 May 26, 2009 11:35
Boundary conditions for stirred tank Jingo Main CFD Forum 2 October 20, 2003 14:21
urgent help needed for meshing in GAMBIT chris FLUENT 0 September 5, 2002 10:18
Flow patterns in a stirred tank Glenn Price Main CFD Forum 13 March 20, 1999 11:16


All times are GMT -4. The time now is 01:29.