UDF for concentration transport equation

November 22, 2006, 23:41

Hi

I am simulating an polymerization reactor.As we know propogation reaction can not be handled in fluent. so i want to use UDS for the perpose.I want to solve species transport equation in terms of concentration. i mean

grad.(V*Conc.ofA - D*grad of Conc. of A)= Source of A (in Kgmoles/m3.sec)

problem is i know source in kgmoles/m3.sec but i can not convert it in kg/m3.sec because molecular weight of redicals very

Anybody have idea how to define this in fluent.I know it can be done using DEFINE_UDS_FLUX but i am not sure how to proceed? Any help regarding this will be appreciated.

Thanks

sanjose · August 15, 2011, 12:23

Hi heri. I'm working in a polymerization reactor also. How did you deal with the simulation of the species? I'm using UDFs for the sources of reaction.
I'd appreciate your response.
Thank you

November 22, 2006, 23:41	UDF for concentration transport equation	#1
heri Guest Posts: n/a	Hi I am simulating an polymerization reactor.As we know propogation reaction can not be handled in fluent. so i want to use UDS for the perpose.I want to solve species transport equation in terms of concentration. i mean grad.(VConc.ofA - Dgrad of Conc. of A)= Source of A (in Kgmoles/m3.sec) problem is i know source in kgmoles/m3.sec but i can not convert it in kg/m3.sec because molecular weight of redicals very Anybody have idea how to define this in fluent.I know it can be done using DEFINE_UDS_FLUX but i am not sure how to proceed? Any help regarding this will be appreciated. Thanks

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August 15, 2011, 12:23		#2
sanjose New Member Ignacio Join Date: Oct 2010 Posts: 4 Rep Power: 16	Hi heri. I'm working in a polymerization reactor also. How did you deal with the simulation of the species? I'm using UDFs for the sources of reaction. I'd appreciate your response. Thank you