CFD Online Logo CFD Online URL
Home > Forums > STAR-CCM+

Modify the geometry and mesh during a simulation

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

Like Tree1Likes
  • 1 Post By abdul099

LinkBack Thread Tools Display Modes
Old   January 10, 2013, 05:29
Default Modify the geometry and mesh during a simulation
New Member
Join Date: Apr 2011
Location: Italy
Posts: 9
Rep Power: 8
virgy is on a distinguished road
I have a generic question:
I start a steady-state simulation with a given geometry, after some iterations I stop the simulation and I modify the geometry and therefore the mesh, then I re-start the simulation without deleting the old fields of the solution. Can this operation affect the right final solution?

I'm relatively new in Star-CCM+, I know it's possible with Star-CCM+ acting in this way and this is the advice of some people more expert than me: so in this way you can use the previous results and you don't lose precious computational time.

However I sometimes realize that this way can create "some hassles and difficulties" to obtain the convergence.

To expert of CFD: Are you agree with that advice?
I know that it could be depend on the type of geometry, mesh, physics.... but have you any guidelines for me?

Thanks for every suggestions, I appreciate a lot.
virgy is offline   Reply With Quote

Old   January 10, 2013, 15:55
Senior Member
Join Date: Oct 2009
Location: Germany
Posts: 637
Rep Power: 15
abdul099 is on a distinguished road
When it's a stationary simulation, it will have NO influence on the final, converged solution. Remeshing is often done to run a modified geometry and start from a solution which is much closer to the final solution than a relative simple initialization. This saves computing time and hence often (but not always) makes sense.

When it's a stationary simulation, you would change the physics by changing the geometry. When you need the time-dependent course, you shouldn't modify your geometry unless that's the real behaviour.
virgy likes this.
We do three types of jobs here:
You may choose any two!
abdul099 is offline   Reply With Quote


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
Gambit problems Althea FLUENT 22 January 4, 2017 04:19
how to set periodic boundary conditions Ganesh FLUENT 13 January 22, 2014 05:11
2D Mesh Generation Tutorial for GMSH aeroslacker Open Source Meshers: Gmsh, Netgen, CGNS, ... 12 January 19, 2012 04:52
fluent add additional zones for the mesh file SSL FLUENT 2 January 26, 2008 12:55
Icemcfd 11: Loss of mesh from surface mesh option? Joe CFX 2 March 26, 2007 18:10

All times are GMT -4. The time now is 23:23.