# Summary of ALE Keywords

Usual Radioss keywords will act on material at related grid points. All the parameters starting with /ALE will directly act on the grid points.

## Description

- /BCS (constraining material velocity on nodes)
- /ALE/BCS (constraining grid velocity on nodes)
- ALE Elementary Boundary Conditions (constraining elementary state)

It is also possible to define Lagrangian nodes within an ALE part by using /ALE/BCS or merging a Lagrangian element.

This is often used in FSI modeling to window a moving free structure with an ALE grid. For example, in ditching, a limited ALE domain can be linked to free interfaced structure. The advantage is that the water and air inlets are constant, since it is initial state with no material velocity.

- /INTER/TYPE1 (ALE nodes on a Lagrangian surface)
- /INTER/TYPE9 (interfacing a Lagrangian surface with a given ALE free surface)
- /INTER/TYPE12 (enables the transmission of flow between 2 ALE surfaces (main and secondary side))
- /INTER/TYPE18 (coupling with Lagrange structure)

- Multi-material laws
- /MAT/LAW37 (BIPHAS) (bi-material liquid gas)
- Multi-Phase material law
- /MAT/LAW26 (SESAM) (SESAME-Johnson-Cook material)
- Boundary material law
- /MAT/LAW11 (BOUND) (Inlet/Outlet material)
- Thermal law
- /MAT/LAW18 (THERM) (Thermal material)

- /MAT/LAW2 (PLAS_JOHNS)
- /MAT/LAW3 (HYDPLA)
- /MAT/LAW4 (HYD_JCOOK)
- /MAT/LAW5 (JWL)
- /MAT/LAW6 (HYDRO or HYD_VISC)
- /MAT/LAW10 (DPRAG1)
- /MAT/LAW11 (BOUND)
- /MAT/LAW16 (GRAY)
- /MAT/LAW21 (DPRAG)
- /MAT/LAW37 (BIPHAS)
- /MAT/LAW41 (LEE_TARVER)
- /MAT/LAW46 (LES_FLUID)
- /MAT/LAW49 (STEINB)
- /MAT/LAW51 (MULTIMAT)
- /MAT/LAW75 (POROUS)
- /MAT/LAW80

- ALE Elementary Boundary Conditions
- /MAT/LAW11 (BOUND) (general case, except if using LAW37 or LAW51)
- /MAT/LAW37 (BIPHAS) (see elementary formulation when using multi-material LAW37)
- /MAT/LAW51 (MULTIMAT) (see elementary formulations when using multi-material LAW51)

- /INIVEL (scattered scheme)

- /ALE/SOLVER/FINT
`Iform`=2

It provides more accurate results for non parallelepipedic shapes. See default formulation for under-integrated formulation in Reduced Integration Method in the Theory Manual.

- High Explosive material laws
- /MAT/LAW5 (JWL)
- High Explosive Ignitions
- /DFS/DETLINE (detonation line)

- /DFS/LASER (LASER beam)
- /MAT/LAW26 (SESAM) (SESAME-Johnson-Cook material - only compatible material)