Command manual

Command list

EOS_POLYNOMIAL

Material properties
*EOS_POLYNOMIAL
eosid, $A$, $B$, $C$

Parameter definition

VariableDescription
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 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.

$\displaystyle{\mu = \frac{\rho}{\rho_0} - 1}$