# Ansys Multiphase

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 October 30, 2014, 10:13 Ansys Multiphase #1 New Member   apostolis Join Date: Oct 2014 Posts: 21 Rep Power: 8 Hi, i want to simulate a pipe that contains water! water's temprature is increased by hot air out of the pipe! water is initial at 300K and the air at 2000K! So we have water liquid inlet and water vapor outlet! How can i have this change of water's phase? Help me please!!!!!!!!

 October 31, 2014, 03:01 #2 Senior Member   Join Date: Jun 2014 Location: Taiwan Posts: 100 Rep Power: 8 I think maybe this would help? Phases→interaction...→Mass→increase "Number of Mass Transfer Mechanisms" to 1 →From phase2(water) to Phase 1(air+vapor), mechansim: evaporation-condensation Need more help... apo likes this.

 October 31, 2014, 08:50 #3 New Member   apostolis Join Date: Oct 2014 Posts: 21 Rep Power: 8 Thanks for your help, I'm new on ansys. I did that, but i don't know what to do on Boundary Conditions. What phase and what type have to choose at hot air and at water on Boundary Conditions to give initial velocity and temperature? Sorry for my English...

 October 31, 2014, 09:28 #4 New Member   apostolis Join Date: Oct 2014 Posts: 21 Rep Power: 8 I want to have only air out of the pipe and change of the phase in to the pipe from water liquid to water vapor!

November 4, 2014, 16:04
#5
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Join Date: Oct 2014
Location: Iran, Tabriz
Posts: 21
Rep Power: 8
Quote:
 Originally Posted by apo Hi, i want to simulate a pipe that contains water! water's temprature is increased by hot air out of the pipe! water is initial at 300K and the air at 2000K! So we have water liquid inlet and water vapor outlet! How can i have this change of water's phase? Help me please!!!!!!!!
does your outlet is only vapor?
you should define volume fraction in inlet and outlet

 November 6, 2014, 04:35 #6 New Member   apostolis Join Date: Oct 2014 Posts: 21 Rep Power: 8 My outlet is only vapor. I want to have phase interaction in the pipe from water liquid to water vapor and only air out of the pipe. I'm new on ansys, can anybody help me?

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