Dynamic under-relaxation -- CFD Online Discussion Forums

February 19, 2010, 16:55	Dynamic under-relaxation	#1
benk Senior Member Ben K Join Date: Feb 2010 Location: Ottawa, Canada Posts: 140 Rep Power: 19	Just out of curiosity, has anybody tried to implement (or perhaps it exists and I just don't know about it) a type of "dynamic under/over-relaxation" function where the relaxation parameter changes on the fly based on the residual history? I've done this before in my own simple matlab code and I've found that it can help speed up convergence or simply get a simulation to converge, especially for highly coupled systems.

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