CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > Siemens > STAR-CCM+

Meshing Process

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

Like Tree3Likes
  • 2 Post By Bharatt
  • 1 Post By Bharatt

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 11, 2015, 23:59
Default Meshing Process
  #1
New Member
 
Sidharth
Join Date: Sep 2015
Posts: 29
Rep Power: 10
sidharth9426 is on a distinguished road
Dear Experts,
I am new to CFD domain, so needed some help regarding the meshing process.
Right now I am working on a project of underhood thermal management using Star CCM as solver.

Now I want some guidance that how meshing process works when we are dealing with meshing of different parts with the control volume.

In the solver there are three different places where the meshing parameters are mentioned, they are
1) The Mesh Continua
2) In the "Regions" node
3) In the individual "boundaries" of the "Regions" node.

It is easy for me to understand that how the meshing at the part level is done, but how these different parts are connected in a control volume to form a Single volume mesh, by defining mesh at different level, is difficult to grab.

So it will be really great help, if someone can can guide me along the process of meshing i.e how the entire mesh is generated from the part level till the control volume and how they are connected, by defining the mesh parameters at different levels.

Thanking You,
Sidharth.
sidharth9426 is offline   Reply With Quote

Old   September 13, 2015, 21:08
Default
  #2
Senior Member
 
Join Date: Nov 2010
Location: USA
Posts: 1,232
Rep Power: 24
me3840 is on a distinguished road
1. Your question implies you are using region-based meshing, which is obsolete. I highly recommend you switch to the part-based meshers. Consult the user guide.

2. I can't say I understand your question though. You have global settings for the meshers which apply certain parameters to all surfaces and certain parameters to the core volume, and you can apply custom settings to either of these. The code figures out the sizing based on your parameters and determines how to transition from one to another.
me3840 is offline   Reply With Quote

Old   September 15, 2015, 01:43
Default region based meshing
  #3
Member
 
Bharatt's Avatar
 
Bharat
Join Date: Jul 2011
Location: Delhi, India
Posts: 49
Rep Power: 14
Bharatt is on a distinguished road
Hi sid,

##################
region- R
part based meshing- PBM
region based meshing- RBM
####################

I hope you are aware of meshing process in PBM, so without dragging into ocean i'll just stick to your pool of questions.

1) THE MESH CONTINUA
here in RBM it is somewhat different compared to PBM. here we define each mesh continua for each region. say you have 3 R's R1, R2 and R3. then you need to define 1 mesh continua for each region.

2) IN THE REGIONS NODE
lets keep it default for the time being, since, it have different parameters to be defined for different mesh models you select under models in mesh continua.

3)IN BOUNDARIES
as we have surface control in PBM here in RBM we define custom sizes under this node. say you have some small parts whisch has to have small mesh size, just select custom surface size under mesh conditions and define the surface size in mesh values.

on a whole PBM is much easier comapre to RBM. yet, the choice is your's.

Cheers,
bharat
sidharth9426 and granzer like this.
__________________
chapter 3:
-crossing the threshold-
Bharatt is offline   Reply With Quote

Old   September 15, 2015, 03:30
Default
  #4
New Member
 
Sidharth
Join Date: Sep 2015
Posts: 29
Rep Power: 10
sidharth9426 is on a distinguished road
Hi bharat,
Thank you for the guidance. .
I just had one more question that if I need to define a solid mesh in my CFD simulation then, do I need do to it in the PBM, or in the RBM I need to define a solid region and define the mesh continua accordingly..?
sidharth9426 is offline   Reply With Quote

Old   September 15, 2015, 04:31
Default
  #5
Member
 
Bharatt's Avatar
 
Bharat
Join Date: Jul 2011
Location: Delhi, India
Posts: 49
Rep Power: 14
Bharatt is on a distinguished road
Quote:
Originally Posted by sidharth9426 View Post
Hi bharat,
Thank you for the guidance. .
I just had one more question that if I need to define a solid mesh in my CFD simulation then, do I need do to it in the PBM, or in the RBM I need to define a solid region and define the mesh continua accordingly..?
well, i suggest you to stick with one method (PBM or RBM) to aviod confusion. coming to query, define that region(solid) seperately and another a mesh continua for it(in RBM).

bharat
sidharth9426 likes this.
__________________
chapter 3:
-crossing the threshold-
Bharatt 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
[ICEM] Flow channel meshing problems StefanG ANSYS Meshing & Geometry 19 May 15, 2012 07:44
Meshing 3D AHU room khimkhim ANSYS Meshing & Geometry 3 November 4, 2009 12:26
Best Meshing scheme for Cylinder Nutrex Main CFD Forum 4 July 29, 2008 12:03
Singularity of grid?Volume meshing vs face meshing Ken Main CFD Forum 0 September 4, 2003 12:09


All times are GMT -4. The time now is 20:47.