Fluid Bulk Modulus

The compressibility is described by the bulk modulus of the fluid:

p = - K (\frac{V (p, θ) - V_{0} (θ)}{V_{0} (θ_{I})}) = - K ρ_{R} (ρ^{- 1} (p, θ) - {ρ_{0}}^{- 1} (θ)),

where

p: is the current pressure,
$θ$: is the current temperature,
K: is the fluid bulk modulus,
$V (p, θ)$: is the current fluid volume,
$ρ (p, θ)$: is the density at the current pressure and temperature,
$V_{0} (θ)$: is the fluid volume at zero pressure and the current temperature,
$V_{0} (θ_{I})$: is the fluid volume at zero pressure and the initial temperature, and
$ρ_{0} (θ)$: is the density at zero pressure and the current temperature.

Parameters


Input Data	Description
Use temperature-dependent data	Specifies material parameters that depend on temperature. A Temperature field appears in the data table. For more information, see Specifying Material Data as a Function of Temperature and Independent Field Variables.
Number of field variables	Specifies material parameters that depend on field variables. Field columns appear in the data table for each field variable you add. For more information, see Specifying Material Data as a Function of Temperature and Independent Field Variables.
Bulk modulus	Fluid bulk modulus, $K$ .