# Transient_Traction

Syntax

  Bc Diffuse For Momentum ([{of} SpeciesName] | [{in} MaterialPhaseName] | [{ls} {a | b | c}]) {@ | at | for | on | over} Mesh Extent Name ([Touching TouchingMeshExtent] | [Opposing OpposingMeshExtent]) = Transient_Traction [Using Data Specification Data Spec Name] ([A_X = a_x] | [A_Y = a_y] | [A_Z = a_z] | [B_X = b_x] | [B_Y = b_y] | [B_Z = b_z])

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 | –
Data Spec Name | string | –
a_x | real | 0
a_y | real | 0
a_z | real | 0
b_x | real | 0
b_y | real | 0
b_z | real | 0