How can I use the frozen permeability feature in Flux?

Yann_Le_Floch

The “Frozen permeability” in Flux is a specific feature that allows freezing the permeability from a first computation. The frozen permeability can be used in a second computation with different values of current, or without magnet for instance.

To activate the frozen permeability, you have to follow the procedure below:

1	1 Solve the first case
2	Select Parameter/Quantity -> Export quantity-> Export spatial quantity and formula starting from different types of supports Here is an example how to fill in the fields: Support for exportation: Face region Face region: Name of one region Export format: DEX Flux file format File Name : Name of the file *.DEX to be created Formula: MurIncr (click on f() to open the formula editor, select µr inc and click on OK)
3	Click on the OK button (normally a specific *.DEX file is created in the working directory)
4	Close the current project
5	Open the 2nd Flux project
6	Select Parameter/Quantity -> Import parameter and quantity -> New (constant) tabulated spatial quantity by importation Here is an example how to fill in the fields: Name of the tabulated…: FROZEN_MU_1 Support for importation: Surface region Surface region: Name of one region File name: *.DEX
7	Click on the OK button
8	Create a new magnetic material (select Physics->Material->New) Fill in the field Name of the material Check the Magnetic property case Select Spatial linear isotropic (close to the end of the list) Select FROZEN_MU_1 in the Spatial relative permeability field Click on the OK button
9	Modify the property of one region in order to use this new material Note: you have to repeat steps 8 and 9 for each region with frozen permeability
10	Solve the 2nd project and analyze the results