/EOS/NOBLE-ABEL
Block Format Keyword Describes the co-volume equation of state .
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/EOS/NOBLE-ABEL/mat_ID/unit_ID | |||||||||
eos_title | |||||||||
b | E0 | Psh |
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) |
|
b | Co-volume. (Real) |
|
Heat Capacity ratio
. (Real) |
||
E0 | Initial internal energy per unit
reference volume. (Real) |
|
Psh | Pressure shift. (Real) |
Example (Noble-Abel)
#---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
fluid material - hydrogen
# RHO_I
0.08988e-6
# NU PMIN
0 1e-20
/EOS/NOBLE-ABEL/7
hydrogen EoS
# b GAMMA E0 PSH
7.691E-3 1.410 0.2439024388557885 0
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#enddata
Comments
- A generalization of the ideal-gas
thermal EOS,
is the co-volume equation of state
Where,
- Specific volume
- b
- Covolume
- R
- Specific gas constant
- T
- Temperature
Previous form , can be written in form.
Where,with
- This EOS applies to dense gases at high pressure for which the volume occupied by the molecules themselves is no longer negligible.
- Covolume b is usually in range
- Some comparison with ideal gas EOS:
IDEAL-GAS NOBLE-ABEL Sound Speed - Equations of state are used by Radioss to compute the hydrodynamic pressure and are compatible with the material laws: