UDF for Combustion

September 29, 2002, 18:08

I'm simulating a straw- and gas fired boiler. Is it possible to use two different diameters for the particles (straws) in the Fluent simulation? One volume sphere diameter for particle tracking and area sphere diameter for (surface) combustion.

I've tried to make an UDF for this case, but I haven't succeeded yet. If anyone has a suggestion how to solve this problem, I would like to hear from you.

S. Berg

October 8, 2002, 00:29

Haven't tried - but you might be able to scale the apparent reaction rate so that it has the same effect as considering a different sized particle. Of course the mass transfer resistance may not account for this.

There's probably others, but that might be a good simple starting point.

Greg

September 29, 2002, 18:08	UDF for Combustion	#1
Steve Berg Guest Posts: n/a	I'm simulating a straw- and gas fired boiler. Is it possible to use two different diameters for the particles (straws) in the Fluent simulation? One volume sphere diameter for particle tracking and area sphere diameter for (surface) combustion. I've tried to make an UDF for this case, but I haven't succeeded yet. If anyone has a suggestion how to solve this problem, I would like to hear from you. S. Berg

October 8, 2002, 00:29	Re: UDF for Combustion	#2
Greg Perkins Guest Posts: n/a	Haven't tried - but you might be able to scale the apparent reaction rate so that it has the same effect as considering a different sized particle. Of course the mass transfer resistance may not account for this. There's probably others, but that might be a good simple starting point. Greg

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Dynamic Mesh UDF	Qureshi	FLUENT	7	March 23, 2017 08:37
UDF parallel error: chip-exec: function not found?????	shankara.2	Fluent UDF and Scheme Programming	1	January 16, 2012 23:14
How to add a UDF to a compiled UDF library	kim	FLUENT	3	October 26, 2011 22:38
UDF...UDF...UDF...UDF	Luc SEMINEL	FLUENT	0	November 25, 2002 05:03
UDF, UDF, UDF, UDF	Luc SEMINEL	Main CFD Forum	0	November 25, 2002 05:01