Ansys Multiphase

apo · October 30, 2014, 11:13

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!!!!!!!!

SJSW · October 31, 2014, 04:01

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 · October 31, 2014, 09:50

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...

apo · October 31, 2014, 10:28

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!

famon · November 4, 2014, 17:04

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

apo · November 6, 2014, 05:35

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?

October 30, 2014, 11:13	Ansys Multiphase	#1
apo New Member apostolis Join Date: Oct 2014 Posts: 21 Rep Power: 12	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, 04:01		#2
SJSW Senior Member Join Date: Jun 2014 Location: Taiwan Posts: 100 Rep Power: 12	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.

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October 31, 2014, 09:50		#3
apo New Member apostolis Join Date: Oct 2014 Posts: 21 Rep Power: 12	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, 10:28		#4
apo New Member apostolis Join Date: Oct 2014 Posts: 21 Rep Power: 12	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 6, 2014, 05:35		#6
apo New Member apostolis Join Date: Oct 2014 Posts: 21 Rep Power: 12	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?