How to use UDF in evaporation.

May 1, 2007, 09:16

I am working on the refrigerant evaporization in a straight tube which is 860mm long.The diameter is 10mm. The aim is to simulate the vapor volume fraction along the tube.The B.C is: inlet, velocity-inlet, saturated liquid(R134a:a kind of refrigerant); outlet, pressure-outlet; wall, the heat flux is a constant: 10kw/m2. UDF(mass transfer) is needed. But how to define the mass transfer of phase changing from liquid to vapor? Anyone who works on the same topic could give me a help?You will be very appreciated.

May 11, 2007, 11:30

i need udf to solve condensation process of R134a.

May 1, 2007, 09:16	How to use UDF in evaporation.	#1
Rikio Guest Posts: n/a	I am working on the refrigerant evaporization in a straight tube which is 860mm long.The diameter is 10mm. The aim is to simulate the vapor volume fraction along the tube.The B.C is: inlet, velocity-inlet, saturated liquid(R134a:a kind of refrigerant); outlet, pressure-outlet; wall, the heat flux is a constant: 10kw/m2. UDF(mass transfer) is needed. But how to define the mass transfer of phase changing from liquid to vapor? Anyone who works on the same topic could give me a help?You will be very appreciated.

May 11, 2007, 11:30	Re: How to use UDF in evaporation.	#2
selim Guest Posts: n/a	i need udf to solve condensation process of R134a.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How to simulate the process of water evaporation by UDF?	qiyang860908	Fluent UDF and Scheme Programming	10	January 9, 2015 14:59
how to write udf for evaporation in heat pipe????	Anbazhagan R	Fluent UDF and Scheme Programming	2	May 3, 2009 08:43
UDF for water evaporation	syed	FLUENT	0	March 14, 2007 23:21
UDF water evaporation	emanuele	FLUENT	0	March 12, 2007 17:34
Evaporation UDF	MN	FLUENT	0	December 8, 2003 21:37