Entropically Damped Artificial Compressibility for SPH

The Entropically Damped Artificial Compressibility (EDAC) method of Clausen [2013] is an interesting alternative to the traditional artifical compressibility technique. We apply the EDAC method in the context of Smoothed Particle Hydrodynamics. In this work we present preliminary results for this method. The method is easy to implement in a standard SPH framework. Our simulations are compared with those of the Transport Velocity Formulation of Adami and Hu [2013] as well as a standard SPH formulation where necessary. The results appear very promising and seem comparable to those of the TVF method. Like the TVF, it does not produce spurious pressure oscillations. Unlike the TVF, which cannot be directly applied to free-surface problems, the new method has no such difficulty.