Damping¶

Type:	float
Range:	[0, 1]
Default:	-/-
Appearance:	optional

An artificial damping is active in the shell region of a sub-domain which overlaps with the neighbouring domains. This parameter effectively shifts the local wave number by a factor $(1+i \kappa)$ where $\kappa$ is the damping value given by this parameter. The default value depends on the shell radius parameter ShellRadius. $\kappa$ and the shell radius are adapted together so that an effective damping of a factor $\mathrm{0.5}$ is reached at the outer boundary of the shell region.

If neither the damping parameter $\kappa$ is set by the user, nor the shell radius ShellRadius and nor DomainDiameter, the damping is set to a 0.1.