The Single Conductor Coil node is available both as a domain and as a boundary feature. It models a conductive (for example, metallic) domain or boundary subject to a lumped excitation, such as a total voltage or current. The excitation specified is translated into a conduction current flowing in the domain (as a current density) or the boundary (as a surface current density). The
Single Conductor Coil domain node is a contributing feature, it is applied on top of an
Ampère’s Law feature that provides the material model (electrical conductivity and relative permittivity). The
boundary node is instead exclusive, since the material model is provided in its
Thin Layer section.
This node is not available in 3D for The Magnetic and Electric Fields Interface and
The Induction Heating Interface. In 2D and 2D axisymmetric components, the direction of the applied electric field is assumed to be out-of-plane. The settings specify how to compute the electric field and the relative current density.
The approach for 3D components is different than for 2D and 2D axisymmetric components. An additional dependent variable Vcoil, with the dimension of an electric potential, is defined in the domain and the current continuity equation is added to the system of equations. The problem solved in the domain becomes effectively an A-V formulation of Maxwell’s equation and current conservation, similar to the one used in the Magnetic and Electric Fields interface.
Select a Coil conductivity σcoil (SI unit: S/m) —
From material (the default) or
User defined. For
User defined select
Isotropic,
Diagonal,
Symmetric, or
Full based on the characteristics of the coil conductivity, and then enter values or expressions in the field or matrix. The default is 1 S/m.
Select a Coil relative permittivity εr,coil (dimensionless) —
From material (the default) or
User defined. For
User defined select
Isotropic,
Diagonal,
Symmetric, or
Full based on the characteristics of the coil relative permittivity, and then enter values or expressions in the field or matrix. The default is 1.
Enter the Thickness ds (SI unit: m) of the thin conductive layer. The default is 1 mm.
For 3D components, the parameters Coil conductivity and
Coil relative permittivity define the material model to be used with the current continuity equation. Normally, these parameters should be the same used in the
Ampère’s Law feature active in the domain.
Select a Coil conductivity σcoil (SI unit: S/m) —
From material or
User defined. For
User defined select
Isotropic,
Diagonal,
Symmetric, or
Full based on the characteristics of the coil conductivity, and then enter values or expressions in the field or matrix.
Select a Coil relative permittivity εr,coil (dimensionless) —
From material or
User defined. For
User defined select
Isotropic,
Diagonal,
Symmetric, or
Full based on the characteristics of the coil relative permittivity, and then enter values or expressions in the field or matrix.