Damping

Syntax

Bc Diffuse For Mesh [{of} SpeciesName | {in} MaterialPhaseName | {ls} {a | b | c}] {on} Mesh Extent Name [Touching TouchingMeshExtent | Opposing OpposingMeshExtent] = Damping [Using Data Specification Data Spec Name] [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.

Parameter

Value

Default

{of}

{of | species | subindex}

–

SpeciesName

string

–

{in}

{in | material_phase}

–

MaterialPhaseName

string

–

{ls}

{levelset_phase | ls}

–

{on}

{@ | at | for | in | on | over}

–

Mesh Extent Name

string

–

TouchingMeshExtent

string

–

OpposingMeshExtent

string

–

Data Spec Name

string

–

scale_factor

real

1