The water is modelled using a hydrodynamic formulation with an equation of state (Sauve R. G. et al. 2004). Shock discontinuities at the shock front are handled using an adaptive bulk viscosity treatment that correctly spreads the shock over a number of elements as a propagated steady wave and eliminates the numerical noise associated with this type of analysis.
Mass per unit volume = 1000 kg/m3
Bulk Modulus = 2071 MPa.