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/ALE/GRID/STANDARD

/ALE/GRID/STANDARD

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/ALE/GRID/STANDARD

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Engine Keyword

/ALE/GRID/STANDARD - Modify Parameters for ALE Grid Formulation

Description

With this keyword it is possible to modify grid formulation parameters, which initially were set in Starter keyword /ALE/GRID/STANDARD. (Altair standard method for grid velocity computation).

Format

/ALE/GRID/STANDARD

symbol_a_14   symbol_y   coeffec-B   lc

Data

Description

SI Unit Example

Scale factor on maximum stiffness

(Real)


Nonlinearity factor for edge spring stiffness

(Real)

 

Damping coefficient

(Real)

 

lc

Characteristic length

(Real)


Comments

1.Default values are taken from a previous run.
2.As of v12.0.210,  /ALE/4 was replaced by /ALE/GRID/STANDARD.
3.Mesh auto correction can be introduced by giving more weight to anti-shear forces by either:
Setting lc parameter close to the mesh size.
Setting a negative value for parameter (elastic forces on edges are set to 0 at the first cycle of current run).

See Also:

Automatic Grid Computation in Theory Manual