CFD Online Discussion Forums

CFD Online Discussion Forums (
-   FLUENT (
-   -   Fluent reaction- udf problem? help (

owen November 11, 2008 04:35

Fluent reaction- udf problem? help
Fluent reaction- udf problem? I have defined a surface reaction by my udf(it is different from the arrhenius rate) ,and have hooked it in the fluent. But I can't find any change in the reaction panel,that is to say I can't find the reaction rate just defined, there is only a arrhenius reaction rate. 1.Does it has adopt the user defined reation by default or is my mistake? 2.If it has adoptde the udf's rate by default ,then how can I set up the stoich coefficient or there is no need to set up it at all?

Thans in advance !

owen November 11, 2008 07:07

Re: Fluent reaction- udf problem? help
who can help me :)

sathees kannan November 12, 2008 10:15

Re: Fluent reaction- udf problem? help
once you have hooked your UDF, then Fluent will take the reaction rate passed by your UDF, it will overwrite the Arrhenius rate passed. If you have hooked in "User Defined Function Hooks" panel, that is enough. Fluent will pass the Stoichiometric Co-eff. which you gave in reaction panel, concentratino of each species to your UDF, thus your UDF will calculate rate of reaction and will return it to Fluent.

Am I answered you.? Best of Luck

owen November 12, 2008 21:31

Re: Fluent reaction- udf problem? help
Thank you very much!

I will try!

Virendra Kumar November 18, 2008 12:42

free jet plow profile
hi sir, i am student. i am doing my project in fluent. i have my problem regarding "free jet flow problem". i am unable to get flow profile through jet flow in environment in the fluent software. if any body help please reply soon. i am very thankful to u.

All times are GMT -4. The time now is 15:39.