|August 7, 2012, 16:09||
Small timestep make the simulation not converge
Join Date: Jul 2012
Posts: 494Rep Power: 8
I was stuck by the convergence problem for whole the last week. Today I accidentally find out why. The reason is I used too small time step. But the FAQ suggests us to use small timestep to make our simulation converge. Could you explain why sometimes, to the contrary of the theory, small time step might even prevent convergence?
|August 7, 2012, 19:25||
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 12,832Rep Power: 100
If your time step gets too small then round off errors can become large. Then the noise from round off error means convergence is difficult.
|Thread||Thread Starter||Forum||Replies||Last Post|
|How to make simulation of body force in plasma actuator induce flow?||mukut||Phoenics||25||April 7, 2011 22:35|
|Timestep for transient simulation||houman||CFX||2||April 28, 2005 03:44|
|flow simulation across a small fan||jane luo||Main CFD Forum||15||April 12, 2004 17:49|
|Numerical simulation on small poo fires||Yun Kang||Main CFD Forum||5||June 25, 2003 06:25|
|timestep for combustion simulation||yangqing||FLUENT||0||August 18, 2002 08:46|