Properties of Vapor for different inlet pressures

narendra.gadwal · May 9, 2012, 01:24

Hello,

I am trying to find out the flow rate value for a valve in which steam is the working fluid.

My BCs are pressure inlet and pressure outlet.

I have three cases to run with three different inlet pressures. I am bit confused what should be the properties of the vapor in the material panel.

Thanks in advance !

delaneyluke · May 9, 2012, 06:39

Your properties will be based on the pressure and temperature of the steam in the domain.
Use this for reference http://webbook.nist.gov/chemistry/fluid/

ticsh · May 11, 2012, 07:30

What type of steam conditions do you use: is it superheated or wet? if you compute the flow of superheated steam, then it's properties can be based on the pressure and temperature. If there is a wet steam in your calculations then the Wet Steam model should be used (you have to set Pressure, Temperature, Wetness and Analog of Droplets Concentration as a BC on Pressure Inlet)

May 9, 2012, 01:24	Properties of Vapor for different inlet pressures	#1
narendra.gadwal Member Narendra Gadwal Join Date: Jul 2010 Location: India Posts: 35 Rep Power: 15	Hello, I am trying to find out the flow rate value for a valve in which steam is the working fluid. My BCs are pressure inlet and pressure outlet. I have three cases to run with three different inlet pressures. I am bit confused what should be the properties of the vapor in the material panel. Thanks in advance !

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May 9, 2012, 06:39		#2
delaneyluke Senior Member Join Date: Mar 2009 Location: Indiana, US Posts: 186 Rep Power: 17	Your properties will be based on the pressure and temperature of the steam in the domain. Use this for reference http://webbook.nist.gov/chemistry/fluid/

May 11, 2012, 07:30		#3
ticsh New Member Join Date: Aug 2011 Posts: 8 Rep Power: 14	What type of steam conditions do you use: is it superheated or wet? if you compute the flow of superheated steam, then it's properties can be based on the pressure and temperature. If there is a wet steam in your calculations then the Wet Steam model should be used (you have to set Pressure, Temperature, Wetness and Analog of Droplets Concentration as a BC on Pressure Inlet)