ISAT error and ddasac failure

July 15, 2003, 11:56

I'm trying to use FLUENT v6.1 for some supersonic combustion research and am getting one of the following errors:

(1) Error: isat_table init: xscale must be positive: x=0.000000e+00 This error happens when using the EDC model w/ ISAT enabled.

(2) Error: rmap2: ddasac failure. This happens at varying # of iterations when I use the EDC model w/ direct integration (w/o ISAT).

Any suggestions on fixing the problem would be appreciated.

Thanks.

--Stephen

July 18, 2003, 13:57

Try to set the error tolerance lower (e.g. 1e-4 or lower) or use direct integration. If that doesn't work, most likely your case cannot be solved by the solver or it doesn't have a converged solution.

July 15, 2003, 11:56	ISAT error and ddasac failure	#1
Stephen Mattick Guest Posts: n/a	I'm trying to use FLUENT v6.1 for some supersonic combustion research and am getting one of the following errors: (1) Error: isat_table init: xscale must be positive: x=0.000000e+00 This error happens when using the EDC model w/ ISAT enabled. (2) Error: rmap2: ddasac failure. This happens at varying # of iterations when I use the EDC model w/ direct integration (w/o ISAT). Any suggestions on fixing the problem would be appreciated. Thanks. --Stephen

July 18, 2003, 13:57	Re: ISAT error and ddasac failure	#2
KT Guest Posts: n/a	Try to set the error tolerance lower (e.g. 1e-4 or lower) or use direct integration. If that doesn't work, most likely your case cannot be solved by the solver or it doesn't have a converged solution.