# /EULER/MAT

Block Format Keyword Compute material flow with EULER framework.

## Format

(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|

/EULER/MAT/mat_ID |

## Definition

Field | Contents | SI Unit Example |
---|---|---|

mat_ID |
Material identifier. (Integer, maximum 10 digits) |

## Example (Air)

```
#RADIOSS STARTER
/UNIT/1
unit for mat
kg m s
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/MAT/HYDRO/4/1
AIR
# RHO_I RHO_0
1.22 0
# Knu Pmin
1.5E-5 0
/EOS/POLYNOMIAL/4/1
AIR
# C0 C1 C2 C3
0 0 0 0
# C4 C5 E0 Pmin RHO_0
0.4 0.4 253300 0 1.22
/EULER/MAT/4
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#enddata
/END
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
```

## Comments

- There is no convection through a boundary face.
- With a collocated scheme (/MAT/LAW151 (MULTIFLUID)) there is by default a slipping wall boundary condition ( ${\upsilon}_{n}\cdot n={\upsilon}_{wall}\cdot n$ ).
- With a staggered scheme (all material laws, except /MAT/LAW151) velocity must be fixed with /BCS option at boundary nodes. You can define either a solid wall boundary condition ( ${\upsilon}_{f}={\upsilon}_{wall}$ ) or a slipping wall boundary condition ( ${\upsilon}_{f}\cdot n={\upsilon}_{wall}\cdot n$ ).
- To define outlet/inlet, refer to ALE Elementary Boundary Conditions (or material boundaries: /MAT/LAW11 (BOUND), /MAT/LAW51 (MULTIMAT)).