Damping

Syntax

Bc No_Coverage_Flux For Mesh ([{of} SpeciesName] | [{in} MaterialPhaseName] | [{ls} {a | b | c}]) {@ | at | for | on | over} Mesh Extent Name ([Touching TouchingMeshExtent] | [Opposing OpposingMeshExtent]) = Damping ([Toggle = toggle] | [Scale_Factor = scale_factor])

Summary

Dampen surface displacements.

Description

F = \frac{-2\mu s}{h} \pd{u}{t}

where 2\mu is the Lame constant, s the optional “scale_factor” parameter, h the mesh size, and u the mesh displacements. This BC is primarily intended for use in conjunction with a rotated BC that enforces the normal mesh displacement, and serves to dampen tangential mesh displacements on the surface.

The following options are present in most boundary conditions/sources. The meaning of each option is as follows:

Toggle

If given, specifies which toggle block controls whether this BC is active or not.

Parameter

Value

Default

{of}

{of | species | subindex}

–

SpeciesName

string

–

{in}

{in | material_phase}

–

MaterialPhaseName

string

–

{ls}

{levelset_phase | ls}

–

Mesh Extent Name

string

–

TouchingMeshExtent

string

–

OpposingMeshExtent

string

–

toggle

“string”

–

scale_factor

real

1