Brinkman Equations
1
In the Model Builder window, under Component 1 (comp1) click Brinkman Equations (br).
2
In the Settings window for Brinkman Equations, locate the Domain Selection section.
3
From the Selection list, choose Porous Copper Wick.
4
Locate the Physical Model section. From the Compressibility list, choose Compressible flow (Ma<0.3).
5
In the pref text field, type p_ref.
Porous Matrix 1
1
In the Model Builder window, under Component 1 (comp1) > Brinkman Equations (br) > Porous Medium 1 click Porous Matrix 1.
2
In the Settings window for Porous Matrix, locate the Matrix Properties section.
3
From the κ list, choose User defined. In the associated text field, type wick_permeability.
Inlet 1
The mass flux of water through the cavity–wick interface must be equal in both the Laminar Flow interface, as well as the Brinkman Equations interface. Using the ratios of densities between vapor and liquid, set a velocity boundary condition on the wick.
1
In the Physics toolbar, click  Boundaries and choose Inlet.
2
In the Settings window for Inlet, locate the Boundary Selection section.
3
From the Selection list, choose Inner Wick Boundary.
4
Locate the Velocity section. Click the Velocity field button.
5
Specify the u0 vector as
u*spf.rho/br.rho
r
w*spf.rho/br.rho
z
Pressure Point Constraint 1
1
In the Physics toolbar, click  Points and choose Pressure Point Constraint.
Apply a pressure constraint of 0[Pa] to the point on the r axis at the interface between the wick and the casing.
2
Select Point 9 only.
3
In the Settings window for Pressure Point Constraint, locate the Pressure Constraint section.
4
In the p0 text field, type 0[Pa].