RF MODULE

2 Select Subdomains 1, 2, and 4 and clear the Active in this domain check box.
3 Select Subdomain 3 and set the Thermal conductivity to 0.55 W/(m·K), the Density
to 1050 kg/m 3 , the Heat capacity to 3.64e3 J/(kg·K), and the Heat source to
Qav_rfw.
4 Click the Init tab and set the Initial value to 273.15+8 K.
5 Click OK.
Boundary Conditions
The default boundary condition, Thermal insulation, is used here so no changes are
necessary.
MESH
Select Mesh case 0 from the Mesh menu.
COMPUTING THE SOLUTION
1 Open the Solver Manager dialog box and on the Solve For page select only the Heat
Transfer by Conduction (or General Heat Transfer) application mode.
2 On the Initial Value page set the Variables not solved for and linearization point to
Current solution.
3 Click OK to close the Solver Manager.
4 In the Solver Parameters dialog box, with the Auto select solver check box selected,
select Transient from the list of analysis types for the Heat Transfer by Conduction (or
General Heat Transfer) application mode in the Analysis types area.
5 Set Linear system solver to Direct (SPOOLES).
6 Under Time stepping set Times to range(0,5) and Absolute tolerance to 1.
7 Click OK to close the Solver Parameters dialog box.
8 Click the Solve button on the Main toolbar.
POSTPROCESSING AND VISUALIZATION
1 To visualize the temperature in the potato, start by opening the Plot Parameters
dialog box.
2 Click the Slice tab and select Heat Transfer by Conduction (ht)>Temperature (or
General Heat Transfer (htgh)>Temperature) from the Predefined quantities list.
166 | CHAPTER 3: RF AND MICROWAVE MODELS