/UPWIND

/UPWIND - Coefficients update for standard Upwind formulations

Description

Enables to modify coefficients for standard upwind formulation previously defined from Starter Input or from previous run.

Format

/UPWIND

η1 η2 η3

Data	Description
η1	Upwind coefficient on ALE momentum transport (See Comment 2) Default = 1.0 (Real) 0 ≤ η1 ≤ 1 (full upwind)
η2	Upwind coefficient on other ALE transports (mass, energy ...) Default = 1.0 (Real) 0 ≤ η2 ≤ 1 (full upwind)
η3	Upwind coefficient for wet area (See comment 3) Default = 1.0 (Real) 0 ≤ η3 ≤ 1

1.	This option can be used with ALE or Eulerian modeling.

2.	This η2 coefficient has no influence if Taylor Galerkine (/UPWM/TG) or Streamline Upwind (/UPWM/SUPG) formulation is defined, except for multi-material law51 (/MAT/MULTIMAT).

3.	η3 is a coefficient for multi-phase law. η3 is only available for multi-material law51 (/MAT/MULTIMAT).

η3 =1 is stable, but diffusive.

η3 =0 is less diffusive, but might be unstable.