UDF for concentration transport equation

November 22, 2006, 22:41

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, 11:23

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, 22:41	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

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Solving Transport equation for additional variable using CFX	creddy_trddc	CFX	11	April 2, 2015 21:07
Charge transport UDF	ak6g08	Fluent UDF and Scheme Programming	1	June 27, 2011 04:21
UDF Transport equation for transition momentum thickness Reynolds number	Wantami	FLUENT	0	April 9, 2011 02:50
Modified e transport equation in k-e model	FluentNewbie	Fluent UDF and Scheme Programming	0	July 6, 2010 11:41
Poisson equation combined with transport equation	Se-Hee	CFX	0	December 27, 2007 01:00

August 15, 2011, 11:23		#2
sanjose New Member Ignacio Join Date: Oct 2010 Posts: 4 Rep Power: 15	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