Using an unsteady solver for unstable simulations -- CFD Online Discussion Forums

October 16, 2006, 10:53	Using an unsteady solver for unstable simulations	#1
Amit Guest Posts: n/a	A few days ago, I posted a message regarding what I could do to converge a laminar sim which would not converge otherwise. An answer I was given was to try an unsteady solver-- to eliminate the instability caused by transient phenomena. I have tried this, but my unsteady solver keeps diverging. Perhaps my setup is wrong. What settings should I be using on my unsteady solver? My sim involves a simulation of larynx flow- average Re # between 1000 and 20000. There is a couple species transport, and on average, any given particle will stay within the geometry of my simulation for t = 0.03 s or less.

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