/EOS/LSZK
Block Format Keyword Describes the Landau-Stanyukovich-Zeldovich-Kompaneets EOS for detonation products.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/EOS/LSZK/mat_ID/unit_ID | |||||||||
eos_title | |||||||||
P0 | Psh | A | b |
Definition
Field | Contents | SI Unit Example |
---|---|---|
mat_ID | Material identifier. (Integer, maximum 10 digits) |
|
unit_ID | Unit identifier. (Integer, maximum 10 digits) |
|
eos_title | EOS title. (Character, maximum 100 characters) |
|
Heat capacity ratio
. (Real) |
||
P0 | Initial pressure. (Real) |
|
Psh | Pressure shift. (Real) |
|
A | EOS parameter. (Real) |
|
b | EOS parameter. (Real) |
Example (Gas)
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/UNIT/1
unit for mat
g mm ms
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/MAT/LAW06/7/1
fluid material
# RHO_I
1.225e-6
# NU PMIN
0 1e-20
/EOS/LSZK/7/1
artificial EOS
# GAMMA P0 PSH A B
2.78 0.1013 0 1.00 1.00
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#enddata
Comments
- The
Landau-Stanyukovich-Zeldovich-Kompaneets EOS 1 for detonation products is:Where,
- Density
- e
- Internal energy density by mass
- b
- Material parameters
This leads to:
Which is the form used by Radioss where,
Where,- E
- Internal energy by initial volume
- A and b
- Material parameters
- Equations of state are used by Radioss to compute the hydrodynamic pressure and are compatible with the material laws:
1 Needham, Charles E. Blast
Waves. Springer, 2003
2 Lutzky, Morton. The Flow Field Behind a Spherical Detonation in TNT Using
the Landau-Stanyukovich Equation of State for Detonation Products. No. NOLTR-64-40.
Naval Ordance Lab White Oak, MD, 1964