Study 2: Phase Envelope Parameterization
Add settings to perform an Auxiliary sweep study, where we vary the mass fraction of ethylene glycol, phase fraction, and coolant pressure.
1
In the Settings window for Stationary, locate the Study Extensions section.
2
Select the Auxiliary sweep checkbox.
3
Click  Add three times. This will add three rows to the table.
4
In the table, enter the following settings (use the associated drop down list):
Parameter name
Parameter value list
Parameter unit
w_EG (Mass fraction, ethylene glycol)
range(0,0.01,1)
 
n (Phase fraction)
0 1
 
pRef (Coolant pressure)
1[atm] 2[atm]
Pa
5
From the Sweep type list, choose All combinations.
The parametric solver has now been set up to compute function values for the entire range of compositions for the binary mixture, only vapor and only liquid, as well as two pressure levels.
6
Locate the Physics and Variables Selection section. In the Physics interface table, clear the Solve for checkboxes for Turbulent Flow, k-ε (spf) and Heat Transfer in Fluids (ht).
7
In the Multiphysics couplings table, clear the Solve for checkbox for Nonisothermal Flow 1 (nitf1).
Go back to the Study node.
1
In the Model Builder window, click  Study 2.
2
In the Settings window for Study, type Study 2: Phase envelope parameterization in the Label text field.
3
Locate the Study Settings section. Clear the Generate default plots checkbox.
4
In the Home toolbar, click  Compute.
The function for the equilibrium values has now been computed for the specified parameters. You can plot the phase envelope, as a function of the mole fraction of ethylene glycol, for the two pressures.