CFD Online Discussion Forums - SOLUTION DIVERGES/UNSTABLE.

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tipakorn

July 28, 2006 02:51

SOLUTION DIVERGES/UNSTABLE.

I run moving mesh but it's not finish and stop analysis, shown error "solution diverges/unstable". How to correct it? I see parameter DISS shown "NaN". Why? Thanks

Ben	July 28, 2006 03:08

Re: SOLUTION DIVERGES/UNSTABLE.

step 1: learn CFD step 2: fix problem

William Blake

July 28, 2006 04:22

Re: SOLUTION DIVERGES/UNSTABLE.

it might help to underrelax the piso algorithm:

algo, piso, node, 20, 0.15, 0.8

or even lower

James

August 23, 2006 00:24

Re: SOLUTION DIVERGES/UNSTABLE.

where to reduce the parameter ?(alog,piso,node) thanks~

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