/ALE/MUSCL
Block Format Keyword This option allows for a second order MUSCL (Monotonic Upstream-Centered Scheme for Conservation Laws) reconstruction of volumic fraction fields when using Multi-Material laws (LAW51), and for a full second order scheme (time and space) when using material LAW151.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/ALE/MUSCL | |||||||||
BETA | IFLAG |
Definitions
Field | Contents | SI Unit Example |
---|---|---|
BETA | Compression coefficient
for gradient reconstruction. Must be between 0.0. and 2.0.
(Real) |
|
IFLAG | Formulation flag for
LAW151 second order.
(Integer) |
Comments
- Finite volume schemes classically rely on the computation of a numerical flux along mesh faces (in 3D) or mesh edges (in 2D). A convenient, yet very diffusive, way to get a robust and stable scheme is to use the upwind technique. The MUSCL1 technique combines an upwind approach to a second order reconstruction of the volume fraction field, allowing for a better localization of the interface between fluids, and much less numerical diffusion.
- /ALE/MUSCL is only compatible with LAW51 for 2D and 3D modeling. It is currently enabled only for volume fraction. A slight computational overcost is to be expected.
- /ALE/MUSCL is also compatible with multimaterial LAW151 and provides a full second order solution (time and space) when IFLAG=0 (default). It is possible to use MUSCL only for the volume fraction field by setting IFLAG=1. The behavior is then the same as for LAW51.