multiphas flow in double pipes

kh91 · April 18, 2014, 15:26

Hi
I am trying to model a two phase flow which is consist of vertical double pipe tube. Very hot gas is flowing through the inner pipe and water is the fluid of outer pipe. The water will be vaporized by the heat of the gas and steam bubbles will be appeared. Gas does not have any phase change ; just becomes cooler. I use the mixture model for two phase flow consist of water and steam. Am i right? If not which model is suitable for this case?
The next question is that when i define the gas, in Boundary Condition , fluent activates the 3phases: mixture, phase1 and phase2‎ for gas, while the gas doesn't have any phase change.How can i fix this?
Thanks in advance.

gerardosrez · November 11, 2014, 15:39

Hi kh91,

Could you solve your problem??

I am going to perform the same simulation. I am working on the mesh right now, but I will be facing this later

Thanks in advance...

April 18, 2014, 15:26	multiphas flow in double pipes	#1
kh91 New Member azadehkhalili Join Date: Apr 2014 Posts: 5 Rep Power: 12	Hi I am trying to model a two phase flow which is consist of vertical double pipe tube. Very hot gas is flowing through the inner pipe and water is the fluid of outer pipe. The water will be vaporized by the heat of the gas and steam bubbles will be appeared. Gas does not have any phase change ; just becomes cooler. I use the mixture model for two phase flow consist of water and steam. Am i right? If not which model is suitable for this case? The next question is that when i define the gas, in Boundary Condition , fluent activates the 3phases: mixture, phase1 and phase2‎ for gas, while the gas doesn't have any phase change.How can i fix this? Thanks in advance. Amir A likes this.

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November 11, 2014, 15:39		#2
gerardosrez Member G. S. Join Date: Nov 2010 Posts: 54 Rep Power: 16	Hi kh91, Could you solve your problem?? I am going to perform the same simulation. I am working on the mesh right now, but I will be facing this later Thanks in advance...