|
[Sponsors] |
December 1, 2013, 09:59 |
controlling timestep decrease
|
#1 |
Member
benoit paillard
Join Date: Mar 2010
Posts: 96
Rep Power: 16 |
Hi all,
I'm running unsteady simulations for which there's a long, uninteresting transient behavior, and then the final 10-20% are relevant. This is due to wake development and convection. For the initial transient part I run at a timestep approximately 10 times larger than the appropriate one. Then I reduce it at the very end when the wake is formed. My question is : is there a way to have that timestep reduced automatically while the computation runs, by changing it with a python script or whatever in the controlDict, after a predefined computation time ? Courant-controlled timestep is useless here, and I do not want to go through a restart (this is what I'm doing right now and I'd like to change that.) Thanks ! |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Modifying sonicFoam to run with variable timestep - strange results | dalaron | OpenFOAM Programming & Development | 1 | September 2, 2013 07:21 |
Restart 2-way FSI with different timestep? | Lance | CFX | 10 | April 17, 2013 00:37 |
Timestep and Pressure Correction Relationship in SIMPLE | rks171 | Main CFD Forum | 23 | May 4, 2012 01:04 |
Adequate timestep selection for multidomain problem | gerardosrez | CFX | 6 | November 28, 2010 17:50 |
Use of Timestep in obtaining solution. | hagupta | CFX | 7 | February 28, 2006 13:14 |