The Wave Equation, Electric node is the main node for the Electromagnetic Waves, Transient interface. The governing equation can be written in the form
for transient problems with the constitutive relations B = μ0μrH and
D = ε0εrE. Other constitutive relations can also be handled for transient problems. The
Divergence Constraint subnode is available from the context menu (right-click the parent node) or from the
Physics toolbar,
Attributes menu.
When Relative permittivity is selected, the default
Relative permittivity εr (dimensionless) takes values
From material. For
User defined select
Isotropic,
Diagonal,
Symmetric, or
Full and enter values or expressions in the field or matrix. If
Effective medium is selected, the
Effective medium subnode is available from the context menu (right-click the parent node) or from the
Physics toolbar,
Attributes menu.
When Refractive index is selected, the default
Refractive index n (dimensionless) takes the value
From material. To specify the refractive index and assume a relative permeability of unity and zero conductivity, for one or both of the options, select
User defined then choose
Isotropic,
Diagonal,
Symmetric, or
Full.
Enter values or expressions in the field or matrix.
For Polarization enter coordinates for the
Polarization P (SI unit: C/m
2).
For Remanent electric displacement enter coordinates for the
Remanent electric displacement Dr (SI unit: C/m
2). Then select
User defined or
From Material as above for the
Relative permittivity εr.
For Drude-Lorentz Dispersion Model select
User defined or
From Material for the
Relative permittivity, high-frequency ε∞ and enter a value for the
Plasma frequency ωp (SI unit: rad/s).
When Drude-Lorentz Dispersion Model is selected, the
Drude-Lorentz Polarization subnode is available from the context menu (right-click the parent node) or from the
Physics toolbar,
Attributes menu. Each
Drude-Lorentz Polarization subnode adds another polarization term
Pn to the electric displacement field
D, defined by
For Relative permeability the relative permeability
μr uses values
From material. For
User defined select
Isotropic,
Diagonal,
Symmetric, or
Full based on the characteristics of the magnetic field, and then enter values or expressions in the field or matrix. If
Effective medium is selected, the
Effective medium subnode is available from the context menu (right-click the parent node) or from the
Physics toolbar,
Attributes menu.
For Remanent flux density the relative permeability
μr uses values
From material. For
User defined select
Isotropic,
Diagonal,
Symmetric, or
Full based on the characteristics of the magnetic field, and then enter values or expressions in the field or matrix. Then enter coordinates for the
Remanent flux density Br (SI unit: T).
By default, the Electrical conductivity σ (SI unit: S/m) uses values
From material.