Field propagator

TimeDependentSource

Advances source.

What it solves

Propagates a source term

S (t) \in V_{h}^{n}

of the form

S (t) = ij k \sum c_{ij k} Λ_{ij k}^{n} * h (ω t),

where $h (ω t)$ is one of the functions in Notes.

$h (ω t) = cos (ω t)$ (default) $h (ω t) = sin (ω t)$

The variables this step updates over a time step dt, and the discrete spaces each one accepts.

Name	Kind	Accepted spaces
`source`	FEECVariable	`H1`

Set these on the propagator in a parameter file, for example TimeDependentSource.Options(omega=...).

Option	Default	Choices	Description
`omega`	`6.28319`	float	Angular frequency of the time-dependent modulation.
`hfun`	`cos`	`cossin`	Time modulation function applied to initial coefficients.

No model in the catalogue currently composes this propagator — it is available for building new models.