Computing inductive heating for fixed power

  1. Select File > Open.

  2. Open the file Inductive_heating.crys.

    The furnace specified will be displayed.

    Inductive heating model 

    Figure 77. Inductive heating model

  3. Select Settings > Heater.

  4. Select the 7 square regions (coils) at the right side of the SCA using CTRL key and left mouse button to define the heater.

    The heater noname will be listed in the left field of the dialog window. The 7 regions (coils) are listed by region number and material assigned in the right field of the dialog window. Because the heater consists of 7 regions and the type of heater is still Resistance, each region gets the same fraction (0.14287).

  5. Replace noname in the field name by Coils and confirm by pressing the Enter key.

    The name of the heater is changed to Coils in the list.

  6. Click on the box next to Induction to change the type of heater and specify a frequency of 10 000 Hz in the neighboring field.

  7. Type 250 in the field Current (A).

    The heater specification should look like this:

    Heaters dialog, inductive heating 

    Figure 78. Heaters dialog, inductive heating

    Note that the Fraction has changed to 1 when changing to inductive heating!

  8. Click on Apply and Close.

  9. Select Settings > Physical Phenomena.

  10. Click on select all regions.

    The dialog window indicates 21 region(s) selected. Temperature and Inductive Heating are available for computation.

  11. Activate Inductive Heating by clicking on the box in the Yes column.

    If you want to continue with resistance heating only, you have to deactivate Inductive Heating in the Physical Phenomena dialog. Otherwise the results will be falsified.

  12. Click on Apply and Close.

  13. Select Settings > Boundaries.

  14. Select the 3 border lines of the furnace in the drawing using the CTRL key and the middle mouse button.

    The dialog window indicates 3 line(s) selected.

  15. Select in-phase-potential from the Variable list box.

  16. Select the boundary type Dirichlet.

  17. Type 0 in the field Value.

  18. Click on Apply and Close.

  19. Select Inductive Heating from the variable group list box in the tool bar.

    The default variable for visualizing the results is in-phase-potential.

  20. At first the total induced heating power in Watt will be computed. It is used as a heat source for computing temperature.

    Click on the Start computation button  .

    Monitor the protocol in the terminal window during computation because only here CrysMAS will specify the calculated total induced heating power (698.093 W). The changed values for the current can be looked up in the Heaters dialog. Whenever you change the heater, you have to repeat the computation of the induced heating.

  21. You can visualize the in-phase-potential, the out-of-phase-potential and the inductive heating source.

    For visualizing the induced heating power it is helpful to choose the Logarithmic scale in the Options for Scalar Fields dialog.

    Select ind.-heat-source from the variable list box and click on the Show/hide scalar field button  .

    For the inductive heating source, the regions in the furnace are displayed where most heat is dissipated: In the crucible.

    Induced heat 

    Figure 79. Induced heat

  22. Click on the Show/hide scalar field button   to turn the scalar field off.

Now you are ready to compute temperature.

Related Procedures

Heaters

Boundary Conditions

Physical Phenomena

Setting options for scalar fields

Related Dialogs

Heaters

Boundaries

Physical Phenomena

Options for Scalar Fields