How to define Particle with UDF?

sega · January 14, 2010, 08:57

Hello World.

I'm using the Discrete Phase Model for the simulation of coal combustion.

Can anyone tell me how I can define a particle which contains different components with an UDF?

I have toyed around with "number of scalars" in the FLUENT GUI, but it leads to nothing, at this time.

So, how can I set up different scalars containing the concentration of each component, which will form my particle?

Have a nice day.
Sebastian

Bernhard · January 18, 2010, 07:23

Maybe you can use P_USER_REAL(particle, i) to define any scalar you like for each particle?

sega · January 19, 2010, 03:43

Quote:

Originally Posted by Bernhard

Maybe you can use P_USER_REAL(particle, i) to define any scalar you like for each particle?

Which can be mass species as well?
Basically anything I can think of?!

Bernhard · January 20, 2010, 04:50

Well, for things like mass are already defined via standard properties, you don't need your own variable for that. For just sperical particles, the combination of diameter and density is sufficient, you can use P_DIAM and P_DENSITY or something for that.

January 14, 2010, 08:57	How to define Particle with UDF?	#1
sega Senior Member Sebastian Gatzka Join Date: Mar 2009 Location: Frankfurt, Germany Posts: 729 Rep Power: 20	Hello World. I'm using the Discrete Phase Model for the simulation of coal combustion. Can anyone tell me how I can define a particle which contains different components with an UDF? I have toyed around with "number of scalars" in the FLUENT GUI, but it leads to nothing, at this time. So, how can I set up different scalars containing the concentration of each component, which will form my particle? Have a nice day. Sebastian __________________ Schrödingers wife: "What did you do to the cat? It's half dead!"

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January 18, 2010, 07:23		#2
Bernhard Senior Member Bernhard Join Date: Sep 2009 Location: Delft Posts: 790 Rep Power: 22	Maybe you can use P_USER_REAL(particle, i) to define any scalar you like for each particle?

January 20, 2010, 04:50		#4
Bernhard Senior Member Bernhard Join Date: Sep 2009 Location: Delft Posts: 790 Rep Power: 22	Well, for things like mass are already defined via standard properties, you don't need your own variable for that. For just sperical particles, the combination of diameter and density is sufficient, you can use P_DIAM and P_DENSITY or something for that.