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

[ANSYS Meshing] How to start meshing this geometry?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 7, 2013, 03:30
Default How to start meshing this geometry?
  #1
Member
 
Thomas Hoffmann
Join Date: Oct 2012
Posts: 67
Rep Power: 4
Thomashoffmann is on a distinguished road
Hi.
I'm not very familiar with Ansys meshing and I have to mesh the geometry attached. It is a nozzle with 3 inlets(when mirrored) in the top and an outlet in the bottom. Two fluids are mixed at the mixing zone in the middle of the nozzle.

Can you help me with some guidelines and ideas for methods to use?
Do I have to split the geometry or do other operations in designmodeler berfore I can mesh it?

Thanks in advance

Thomas
Attached Images
File Type: png Capture.PNG (26.1 KB, 33 views)
File Type: jpg Capture1.jpg (13.8 KB, 30 views)
File Type: png Capture2.PNG (17.4 KB, 26 views)
File Type: png Capture3.PNG (26.8 KB, 29 views)
File Type: png Capture4.PNG (18.6 KB, 23 views)
Thomashoffmann is offline   Reply With Quote

Old   March 7, 2013, 04:11
Default
  #2
Senior Member
 
Javi
Join Date: Jan 2013
Posts: 237
Rep Power: 7
FJSJ is on a distinguished road
Hi,

I can say Im a beginner. But looking for my geometry I saw this video on youtube:

http://www.youtube.com/watch?v=KabKFrJK3fM

Not is equal. But, maybe, its useful to see how to mesh the hydrocyclone because is similar to your geometry.
FJSJ is offline   Reply With Quote

Old   March 14, 2013, 02:27
Default
  #3
Member
 
Join Date: Sep 2012
Location: FL
Posts: 76
Rep Power: 4
victoryv is on a distinguished road
Quote:
Originally Posted by Thomashoffmann View Post
Hi.
I'm not very familiar with Ansys meshing and I have to mesh the geometry attached. It is a nozzle with 3 inlets(when mirrored) in the top and an outlet in the bottom. Two fluids are mixed at the mixing zone in the middle of the nozzle.

Can you help me with some guidelines and ideas for methods to use?
Do I have to split the geometry or do other operations in designmodeler berfore I can mesh it?

Thanks in advance

Thomas
1.First I would remove some of the narrow faces visible in figure 4 like fillets etc in Designmodeler to make my life more easier. (Waste of computation power).
2.Use fill option, to fill it with the Fluid. Then suppress the solid. Change the inside part from solid to fluid.
3.If you have a full model, Then use symmetry plane to split it into two.
4.Then in Ansys Meshing, if bodies are sweepable, I would choose Multizone/ Sweep mesh or else tetra(patch conforming-proximity and curvature).
5.Add inflation layers to the the nozzle and the other inlet.
6.In Fluent, choose the multiphase option, add the material and in bc's specify the values of mixture and phases.
7. If the flow is turbulent based on the Re, I would chose k omega (try k epsilon to see if it gives proper results and try with y+~30) turbulence model with wall functions and y+ value around 30 as there is no flow separation etc.

I would add inflation layer after calculating y+ value and BL thickness (estimated from flow regimes in pipe) and then use these for initial thickness and no of layers values in inflation option.
victoryv is offline   Reply With Quote

Old   March 14, 2013, 10:27
Default
  #4
Member
 
Thomas Hoffmann
Join Date: Oct 2012
Posts: 67
Rep Power: 4
Thomashoffmann is on a distinguished road
thanks. I'm working with it.. Right now I have the problem that I can't mesh it when I have the face seen on picture 2 as symmetry. The error is 'an inter-process communication error occurred while communicating with the MESHER module.'
If I remove the named selection 'symmetry' there is no problem??
Thomashoffmann is offline   Reply With Quote

Old   March 16, 2013, 00:23
Default
  #5
Member
 
Join Date: Sep 2012
Location: FL
Posts: 76
Rep Power: 4
victoryv is on a distinguished road
Quote:
Originally Posted by Thomashoffmann View Post
thanks. I'm working with it.. Right now I have the problem that I can't mesh it when I have the face seen on picture 2 as symmetry. The error is 'an inter-process communication error occurred while communicating with the MESHER module.'
If I remove the named selection 'symmetry' there is no problem??
This is a bug with the software I guess. I am not sure but check these out. Also, you shouldn't remove the symmetry condition as it is symmetry plane physically.

http://www.eureka.im/5199.html

Ansys Meshing Error on Generation
victoryv 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
[ICEM] Meshing an irregular geometry Fabio Tabacow ANSYS Meshing & Geometry 6 May 7, 2014 16:03
[ICEM] Geometry Meshing protea ANSYS Meshing & Geometry 2 November 22, 2011 13:15
[ANSYS Meshing] Using more than one meshing method on a single 2D geometry robbierich90 ANSYS Meshing & Geometry 0 October 30, 2011 14:12
[ANSYS Meshing] Help - Meshing 2 Surfaces On A 2D Geometry Ali_M ANSYS Meshing & Geometry 4 March 29, 2011 03:01
Problematic geometry in Ansys Meshing ATOTA ANSYS Meshing & Geometry 1 October 9, 2010 11:51


All times are GMT -4. The time now is 01:46.