UDF for Evaporation

Rana · August 25, 2010, 03:54

i need to write a udf for evaporation occurring by means of decreasing pressure which in turn decreases the temperature.

can anyone help me...

thanks

Allan Walsh · August 25, 2010, 14:59

Are you modeling evaporation from discrete particles? Or from a pool of liquid? There are some examples of doing the former in the UDF manual.
What is your time schedule? Based on experience from modeling evaporation from particles, you would want to schedule several weeks for a task such as this. Good luck.

Rana · August 26, 2010, 01:05

Dear Allan

I have to do it for refrigerant flow in a capillary tube. I planned to spend a week for this.

Any idea or tutorials is available for this type of simulation in fluent?

Allan Walsh · August 26, 2010, 14:36

I would start with the tutorials for two-phase flow which allow for boiling/evaporation. There is at least one for water.

August 25, 2010, 03:54	UDF for Evaporation	#1
Rana New Member Rana Join Date: Apr 2010 Posts: 10 Rep Power: 16	i need to write a udf for evaporation occurring by means of decreasing pressure which in turn decreases the temperature. can anyone help me... thanks

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August 25, 2010, 14:59		#2
Allan Walsh Member Allan Walsh Join Date: Mar 2009 Posts: 56 Rep Power: 17	Are you modeling evaporation from discrete particles? Or from a pool of liquid? There are some examples of doing the former in the UDF manual. What is your time schedule? Based on experience from modeling evaporation from particles, you would want to schedule several weeks for a task such as this. Good luck.

August 26, 2010, 01:05		#3
Rana New Member Rana Join Date: Apr 2010 Posts: 10 Rep Power: 16	Dear Allan I have to do it for refrigerant flow in a capillary tube. I planned to spend a week for this. Any idea or tutorials is available for this type of simulation in fluent?

August 26, 2010, 14:36		#4
Allan Walsh Member Allan Walsh Join Date: Mar 2009 Posts: 56 Rep Power: 17	I would start with the tutorials for two-phase flow which allow for boiling/evaporation. There is at least one for water.