/DFS/LASER
Block Format Keyword Enable to model laser impact taking into account laser-matter interaction. 1
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/DFS/LASER/laser_ID/unit_ID | |||||||||
SLAS | fct_IDLAS | STAR | fct_IDTAR | ||||||
Hn | VCp | K0 | Rd | KS | |||||
Np | Nc | ||||||||
IEL1 | IEL2 | IEL3 | IEL4 | IEL5 | IEL6 | IEL7 | IEL8 | IEL9 | IEL10 |
IEL11 | etc | IELNp |
Definitions
Field | Contents | SI Unit Example |
---|---|---|
laser_ID | Laser line
identifier. (Integer, maximum 10 digits) |
|
unit_ID | Unit Identifier (Integer, maximum 10 digits) |
|
SLAS | Laser intensity scale
factor. (Real) |
|
fct_IDLAS | Laser intensity time
function number. (Real) |
|
STAR | Target absorption scale
factor. (Real) |
|
fct_IDTAR | Target absorption
temperature function number. (Integer) |
|
Hn | Plasma parameter.
Where,
(Real) |
|
VCp | Enthalpy of
vaporization. (Real) |
|
K0 | Inverse bremsstrahlung
coefficient K0. 6 (Real) |
|
Rd | Inverse bremsstrahlung
coefficient
. 6 (Real) |
|
KS | Compliment absorption in
vapor. 5 (Real) |
|
Np | Number of plasma elements
between laser and target. (Integer) |
|
Nc | Target element number.
1 (Integer) |
|
IELi | List of plasma elements
(i=1,..., Np).
3 (Integer) |
Comments
- Laser-matter interaction requires material laws enabling different phases: solid, liquid, and gas. It also needs to have a correct behavior with high pressure (several megabars) and high temperatures (more than 10000K). /MAT/LAW26 (SESAM) must also be used.
- This option is available only in 2D analysis.
- Plasma elements must be entered in the order from laser to target.
- It is assumed the laser beam is perpendicular to the target.
- is taken from K. Daree's plasma ignition model.
-
(1) (2) (3) Usually, and .