why heating water have no water vapour?

peterlee · July 24, 2009, 05:02

Hi, everyone!

I am trying to set up water boiling model with the help of "boiling-water.ccl" installed in the CFX directory. And I have modified many option which are approprite for heat transfer, momentum transfer, and mass transfer, in addition, I introduced "Musig Fluid model"

However, when the water tempreture rise up to 373k, there have no water vapour which should be produced near the heated wall !!!

So, may I know your finer idea in sovling the problem?
thank you peter

mettler · July 24, 2009, 09:11

I know in Fluent when I did something similar to this I had to set it up for two phase flow. Have you done this? Fluent has/had a good tutorial for boiling water.

peterlee · July 24, 2009, 23:58

Fluent can't simulate the superheated boiling well, and I have seen a movie file showing boiling water made by CFX, so I believe CFX can do it perfectly.

peterlee · July 25, 2009, 00:09

With the help of "boiling-water.ccl" which use water and water vapour form two phase flow in the installed directory of CFX, in addition, I chose other models for MOM transfer, heat transfer, and mass transfer, phase change tem. is 373k. But there have no water vapour near the heated wall !

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July 24, 2009, 09:11		#2
mettler Senior Member Andrew Join Date: Mar 2009 Location: Washington, DC Posts: 211 Rep Power: 18	I know in Fluent when I did something similar to this I had to set it up for two phase flow. Have you done this? Fluent has/had a good tutorial for boiling water.

July 24, 2009, 23:58		#3
peterlee New Member peterlee Join Date: May 2009 Posts: 10 Rep Power: 17	Fluent can't simulate the superheated boiling well, and I have seen a movie file showing boiling water made by CFX, so I believe CFX can do it perfectly.

July 25, 2009, 00:09		#4
peterlee New Member peterlee Join Date: May 2009 Posts: 10 Rep Power: 17	With the help of "boiling-water.ccl" which use water and water vapour form two phase flow in the installed directory of CFX, in addition, I chose other models for MOM transfer, heat transfer, and mass transfer, phase change tem. is 373k. But there have no water vapour near the heated wall !