What does mean "cells limited by chemical eigenvalue" after enabling the stiff solver -- CFD Online Discussion Forums

December 19, 2019, 10:24

What does mean "cells limited by chemical eigenvalue" after enabling the stiff solver

Roh

Senior Member

Join Date: Sep 2017

Posts: 130

Rep Power: 8

Guys,
I'm trying to perform a 2D simulation of detonation using an 8-reactions chemical mechanism but the solver diverged then I enabled the stiff chemistry solver to converge the simulation but got such such warnings e.g. :

Quote:

37615 cells limited by chemical eigenvalue
corrections zeroed in 3 cells due to excessive temperature change

What do mean these warnings?

December 24, 2019, 03:50		#2
Roh Senior Member Join Date: Sep 2017 Posts: 130 Rep Power: 8	No idea??????

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