EOS_POLYNOMIAL
γSPH
Deprecated command
As a consequence of γSPH offboarding, this command will no longer work from June 1, 2025.
*EOS_POLYNOMIAL
eosid, $A$, $B$, $C$
eosid, $A$, $B$, $C$
Parameter definition
Variable
Description
eosid
Unique EOS identification number
$A$
Polynomial coefficient
$B$
Polynomial coefficient
$C$
Polynomial coefficient
Description
This is a polynomial equation-of-state that currently only works with $\gamma$SPH particles. Note that the linear bulk modulus, $K$, is determined from the elastic properties in the material command.
$p = K \mu + A \mu^2 + \frac{B + C \mu}{1 + \mu} e$
where $e$ is the specific internal energy per unit volume and $\mu$ is a measure of the volumetric compression.
$\displaystyle{\mu = \frac{\rho}{\rho_0} - 1}$
