Command manual

This is a generic equation-of-state defined by two user-supplied CURVEs or FUNCTIONs. The first defines $C(\varepsilon_v)$ and the second defines $T(\varepsilon_v)$, both as functions of the logarithmic volumetric strain:

$\displaystyle{\varepsilon_v = \ln\left(\frac{V}{V_0}\right)}$

The thermodynamic pressure is calculated as:

$\displaystyle{p = C(\varepsilon_v) + \Gamma \cdot T(\varepsilon_v) E}$

where $V$ is the current volume, $V_0$ is the initial volume and $E$ is the internal energy per initial volume. The curves are linearly interpolated between data points and linearly extrapolated outside their defined range.