Defining the Magnetic Susceptibility Temperature Factor

For ferromagnetic and paramagnetic materials, for which the $B$ - $H$ curve is nonlinear, you define the magnetic permeability using the Table (B,H) method. To account for the dependence of the permeability on temperature, you also define the susceptibility temperature factor of the material.

The susceptibility temperature factor defines how the magnetic susceptibility changes with temperature, with respect to a reference magnetic susceptibility (see Eqn. (4225)). Simcenter STAR-CCM+ derives the reference magnetic susceptibility from the

B

H

curve of the material.

To account for the dependence of the material permeability on temperature:

In the relevant physics continuum, activate a physics model that prescribes or computes temperature. See Defining Temperature-Dependent Properties.
Define the $B$ - $H$ curve of the material using the Table (B,H) method. For instructions, see Defining the Magnetic Permeability Using a B-H Curve).

To specify the susceptibility temperature factor:

Expand the relevant [physics continuum] > Models > [Material Model] > [Material] > Material Properties node.
Select the Susceptibility Temperature Factor node and choose the Method for defining the factor $S (T)$ (see Eqn. (4225)).
You can define $S (T)$ using a constant, a field function, or a table of $S, T$ values.

To define

S (T)

using a table:

Prepare a table file containing two columns of values for $S$ and $T$ .
The temperature values in the table must be consistent with the minimum and maximum allowable temperature values specified under the [physics continuum] > Reference Values node. Specifically:
- the maximum temperature value in the table must be equal to or higher than the Maximum Allowable Temperature reference value
- the minimum temperature value in the table must be equal to or lower than the Minimum Allowable Temperature reference value
Import the table into Simcenter STAR-CCM+ using one of the following methods:
- import the table as a file table under the Tools > Tables node
- import the table into the material database. For instructions, follow the remaining steps.
To import the table into the material database:
1. Expand the Tools > Material Databases node.
2. Right-click the relevant solid material node and select New Database Properties...
3. In the Select Database Properties dialog, activate Magnetic Susceptibility - Table (S, T), then click OK.
  The Magnetic Susceptibility Temperature Factor node appears under the material node.
4. Right-click the Magnetic Susceptibility Temperature Factor > Table(T) > Material Database Table node and select Import Material Table from a file.
5. In the Open dialog, select the appropriate table file and click Open.
  The selected table is loaded into the material database.
Use the imported table to define $S (T)$ :
1. Select the [physics continuum] > Models > [Solid] > [Material] > Material Properties > Magnetic Susceptibility Temperature Factor > Table(T) > Table(T) node.
2. Specify the Input table:
  - If you want to use the table from the material database, select Material Database Table.
  - If you want to use an imported file table, select the relevant table from the list.
3. Specify the columns that represent the values for the magnetic susceptibility temperature factor $S$ and temperature $T$ using the properties, Table: Data and Table: Temperature, respectively.