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

[ANSYS Meshing] Geometry and meshing stirred tank

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

Like Tree1Likes
  • 1 Post By laolartet

Reply
 
LinkBack Thread Tools Display Modes
Old   March 11, 2014, 17:31
Red face Geometry and meshing stirred tank
  #1
New Member
 
Arturo
Join Date: Jun 2012
Posts: 2
Rep Power: 0
laolartet is on a distinguished road
Dear members

I'm trying to mesh a stirred tank, but I'm having some problems,in this moment I am considering only the fluid and one impeller (a rhuston turbine), however the final reactor have: 2 impeller, 8 “accessories” (4 from the bottom and 4 from the top), 1 sparger and 4 baffles, the first image is a first approximation, I know I must simplify it.

I’m working in Design Modeler and because of the complexity of the model I started with only one agitator and the tank, then I generated the “fluid”, and after that volume for MRF with “slice material” thenI extracted the volume of the impeller with “slice material”and “suppres body”. (Second image)

I tried meshing (ICEM ansys meshing) with hex dominant (External volume or fluid) and tetra (internal MRF), but when I execute it on fluent it doesn’t converge, I tried also meshing just tetra and it improved but still doesn’t converge.

How can I improve the meshing?
Am I creating the volume properly?

MRF or Sliding mesh? I work with MRF but I read that by the number of accessories is better work with sliding.

Thanks in advance

Arturo
Attached Images
File Type: jpg Image 1.jpg (43.7 KB, 65 views)
File Type: jpg Image 2.jpg (78.0 KB, 47 views)
File Type: jpg Image 3.jpg (97.7 KB, 54 views)
File Type: jpg Image 4.jpg (59.7 KB, 37 views)
File Type: jpg 1.jpg (27.1 KB, 30 views)
jotac likes this.

Last edited by laolartet; March 18, 2014 at 00:29. Reason: New image
laolartet is offline   Reply With Quote

Old   March 22, 2016, 07:28
Default
  #2
New Member
 
Jose Carlos
Join Date: May 2013
Posts: 2
Rep Power: 0
jotac is on a distinguished road
Dear laolartet,

have you solved your problem?

I'm doing something similar, but I'm facing many problems to mesh my geometry with hexahedral elements..

Thanks in advance for anyone that can help.

J
jotac is offline   Reply With Quote

Old   March 22, 2016, 11:05
Default
  #3
Senior Member
 
ztdep's Avatar
 
p ding
Join Date: Mar 2009
Posts: 312
Rep Power: 10
ztdep is on a distinguished road
Send a message via Yahoo to ztdep Send a message via Skype™ to ztdep
dear friends:
"did not converge" may not caused only by the mesh system, but it has a great effects on the solution process.
I think you geometry is relatively regular, just make a multiblock grid systems with icemcfd.
the grid number can be decreased greatly, and the solution process can be more stabilized.

tried to use more robuster solver such as the fully coupled solver in fluent.
ztdep 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
stirred tank meshing gurpreet89 FLUENT 2 December 3, 2013 15:58
[Workbench] Meshing stirred tank Shaafi ANSYS Meshing & Geometry 6 May 4, 2013 09:39
[ANSYS Meshing] stirred tank meshing jamalf64 ANSYS Meshing & Geometry 16 April 20, 2013 16:00
[GAMBIT] meshing stirred tank jamalf64 ANSYS Meshing & Geometry 16 February 12, 2013 08:00
Gambit Meshing of stirred mixing tank shadyenany FLUENT 4 September 15, 2011 12:13


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