Linear Permanent Magnet General Model Reference


Model Name	Linear Permanent Magnet General
Theory	See Permittivity and Permeability and Source Terms.
Provided By	[physics continuum] > Models > Permanent Magnet Specification
Example Node Path	Continua > Physics 1 > Models > Linear Permanent Magnet Geneal
Requires	Space: one of Two Dimensional, Three Dimensional, Axisymmetric Time: one of Steady, Implicit Unsteady Material: one of Solid, Multi-Component Solid > Multi-Part Solid Optional Models: Electromagnetism Electromagnetism: one of Finite Element Magnetic Vector Potential, Finite Volume Magnetic Vector Potential, Transverse Magnetic Potential . Optional Models: Permanent Magnet
Activates	Model Controls (child nodes)	Magnetization Direction. See Model Controls (Child Nodes).
	Material Properties	Remanence Flux Density. See Material Properties.
	Region Inputs	Magnetization Direction. See Region Settings.
	Boundary Inputs	Magnetization Direction. See Boundary Settings.
	Field Functions	Remanent Magnetic Flux Density. See Field Functions.

Model Controls (Child Nodes)

Magnetization Direction: Allows you to specify the unit vector that defines the direction of the remanence flux density of the magnet (see Remanence Flux Density). Simcenter STAR-CCM+ applies the specified direction to all the regions associated with the continuum. You can override the continuum value using the Magnetization Direction physics condition, which is available for both regions and boundaries. See Region Settings and Boundary Settings.

Material Properties

Magnetic Permeability

Specifies the magnetic permeability

μ

of the magnet (see Permittivity and Permeability).

Method	Corresponding Method Node
Constant, Field Function Suitable for most cases, allows you to specify $μ$ (Eqn. (4220)) using a constant value or a field function.	Magnetic Permeability > Constant, Field Function Specify $μ$ as a scalar profile.
Table (T) Allows you to specify $μ$ as a function of temperature using a table of $μ, T$ values. For more information, see Using Table(T).	Magnetic Permeability > Table (T) > Table (T) Specifies the $μ, T$ table through the following properties: Input Table—allows you to select the table with the $μ, T$ data. You can select an imported file table or a table from the material database. When you create the table, use the column headers "Permeability" and "Temperature", including the quotation marks. Table: Data—specifies the table column that contains the values of $μ$ . Table: Temperature—specifies the table column that contains the values of $T$ .

Method

Corresponding Method Node

Constant, Field Function: Suitable for most cases, allows you to specify $μ$ (Eqn. (4220)) using a constant value or a field function.

Magnetic Permeability > Constant, Field Function: Specify $μ$ as a scalar profile.

Table (T): Allows you to specify $μ$ as a function of temperature using a table of $μ, T$ values. For more information, see Using Table(T).

Magnetic Permeability > Table (T) > Table (T)

Specifies the

μ, T

table through the following properties:

Input Table—allows you to select the table with the $μ, T$ data. You can select an imported file table or a table from the material database. When you create the table, use the column headers "Permeability" and "Temperature", including the quotation marks.
Table: Data—specifies the table column that contains the values of $μ$ .
Table: Temperature—specifies the table column that contains the values of $T$ .

Remanence Flux Density

Specifies the magnetic flux density that remains in a permanent magnet after any external magnetic field is removed (

B_{r}

in Eqn. (4312) and in the B-H Curve). You specify the remanence flux density as a scalar—the direction of magnetization is specified separately. See Magnetization Direction.

The material database allows you to store the remanence flux density for any material. See Modeling Permanent Magnets.

Method	Corresponding Method Node
Constant, Field Function Suitable for most cases, allow you to specify $B_{r}$ as a constant or field function.	Remanence Flux Density > Constant, Field Function Specify $B_{r}$ as a scalar profile using a constant value or a field function.
Table (T) Allows you to specify $B_{r}$ as a function of temperature using a table of $B_{r}, T$ values. For more information, see Modeling Permanent Magnets.	Remanence Flux Density > Table (T) > Table (T) Specifies the $B_{r}, T$ table through the following properties: Input Table—allows you to select the table with the $B_{r}, T$ values. You can select an imported file table or a table from the material database. When you create the table, use the column headers "Magnetic Remanence" and "Temperature", including the quotation marks. Table: Data—specifies the table column that contains the values of $B_{r}$ . Table: Temperature—specifies the table column that contains the values of $T$ . For more information, see Using Table(T).
Polynomial in T Allows you to specify $B_{r}$ as a function of temperature using a polynomial expression. This method is available when you activate a model that solves for, or prescribes, the temperature field.	Remanence Flux Density > Polynomial in T Specifies $B_{r}$ as a polynomial function of temperature, for heat transfer analysis. See Using Polynomial in T.

Region Settings

Applies to solid regions.

Magnetization Direction

Allows you to specify the magnetization direction at the region level, overriding the magnetization direction that is specified in the physics continuum.

Method	Corresponding Physics Value Nodes
Use Continuum Values For this region, Simcenter STAR-CCM+ uses the magnetization direction specified under the [physics continuum] > Models > Permanent Magnet > Magnetization Direction node.	None
Specify Region Values Allows you to specify the magnetization direction for this region. Simcenter STAR-CCM+ ignores any direction specified under the [physics continuum] > Models > Permanent Magnet > Magnetization Direction node.	Magnetization Direction Specifies the unit vector that defines the direction of the remanence flux density.

Boundary Settings

Applies to wall boundaries.

Magnetization Direction

Allows you to specify the magnetization direction at the boundary level, overriding the magnetization direction that is specified for the region. This option is available when you do both of the following:

You set the Magnetization Direction region condition to Specify Region Values.
You activate the region property Allow Per-Part Values.

Field Functions

Remanent Magnetic Flux Density: Corresponds to $B_{r}$ in Eqn. (4312).