Initial Air inside of Airbag
Material for the air inside of the airbag should be specified either through /MAT/GAS/MASS, /MAT/GAS/MOLE or /MAT/GAS/PREDEF.
In the latter case, the gas material is defined in the /MAT/GAS/PREDEF card in the units defined in the /BEGIN card.
Generic material card for air (kg, mm,
ms):
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/MAT/GAS/PREDEF/4
Initial gas
AIR
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/MAT/GAS/MASS/102
AIR, kg, mm, ms
# MW
# Cpa Cpb Cpc Cpd Cpe
966.99 0 0 0 0
# Cpf
0
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/MAT/GAS/MOLE/104
AIR, kg, mm, ms
# MW
0.028013
# cpa cpb cpc cpd cpe
27.088 0 0 0 0
# cpf
0
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|The same air material used in the airbag should also be used as air in the tank test simulation for validation of injector.