7.14.1.9. Lubrication

Beta Capability

The lubrication modeling capability is under active development hence this equation should be used with caution.

Syntax

Eq Lubrication for Associated DoF [{of} SpeciesName | {in} MaterialPhaseName | {ls} {a | b | c}] {on} MeshPart using Interp with {Term_0} … {Term_N}

Scope

Aria Region

Summary

Activates the Reynolds’ Lubrication Equation.

Description

The only admissible value for Dof is LUBRICATION_PRESSURE.

The only admissible value for Interp is Q_{1}P_{0}.

Admissible values of Term_n are MASS, DIFF, and BOUND.

With the exception of XFER these terms are described in Lubrication Equation.

For problems with fluid-structural interactions, the lubrication equation needs to be defined on all blocks, including 3-D blocks adjoining the shell lubrication region. In order to accommodate this, there is an additional term, DEF, which applies the equation p=0 on adjoining 3-D blocks where this is used. The other terms should not be used on 3-D blocks. It is weighted so that it does not affect the residual on the shell blocks.

The Meshpart must be an active shell element block.

Parameter

Value

Default

{of}

{of | species | subindex}

–

SpeciesName

string

–

{in}

{in | material_phase}

–

MaterialPhaseName

string

–

{ls}

{levelset_phase | ls}

–

Associated DoF

string

–

{on}

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

–

MeshPart

string

–

Interp

string

–

{Term_n}

See Description

–