temperature limited or floating error during reaction

wlt_1985 · August 5, 2011, 03:43

I success to model my flow in steady state, then I further to model flow incorporated with self-defined chemical reaction with either DEFINE_SOURCE or DEFINE_VR_RATE. Both of them were fail due to TEMPERATURE LIMITED or FLOATING POINT ERROR:INVALID NUMBER. I totally do not have idea to solve it. Please help me. It is urgent. Any solution to it?

Micael · August 5, 2011, 21:13

When resorting to DEFINE_SOURCE, it is generally necessary to linearize the source term. My guess is that this is your problem. Look at the udf guide for the procedure to do it.

wlt_1985 · August 6, 2011, 00:08

Quote:

Originally Posted by Micael

When resorting to DEFINE_SOURCE, it is generally necessary to linearize the source term. My guess is that this is your problem. Look at the udf guide for the procedure to do it.

Thanks Micael. I am trying to solve it and willing to show you my findings later on. Thanks.

August 5, 2011, 03:43	temperature limited or floating error during reaction	#1
wlt_1985 Senior Member raymond Join Date: Nov 2009 Posts: 149 Rep Power: 17	I success to model my flow in steady state, then I further to model flow incorporated with self-defined chemical reaction with either DEFINE_SOURCE or DEFINE_VR_RATE. Both of them were fail due to TEMPERATURE LIMITED or FLOATING POINT ERROR:INVALID NUMBER. I totally do not have idea to solve it. Please help me. It is urgent. Any solution to it?

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August 5, 2011, 21:13		#2
Micael Senior Member Micael Join Date: Mar 2009 Location: Canada Posts: 157 Rep Power: 18	When resorting to DEFINE_SOURCE, it is generally necessary to linearize the source term. My guess is that this is your problem. Look at the udf guide for the procedure to do it.