|December 1, 2013, 10:59||
controlling timestep decrease
Join Date: Mar 2010
Posts: 42Rep Power: 7
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.)
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