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SPH modeling of multiphase drop dynamics

This paper presents an SPH (smoothed particle hydrodynamics) model for numerical simulation of multiphase drop dynamics including liquid drop formation and deformation, coalescence and separation, liquid drop impacting, spreading and splashing. SPH is a Lagrangian, meshfree particle method. It has special advantages in modeling multiphase drop dynamics. Surface tension effects are modeled using a particle-particle interaction force, which avoids the calculation of surface and interface curvature. Solid boundaries are modeled using a coupled dynamic boundary treatment algorithm, which ensures the accuracy and flexibility of the SPH method. Numerical investigations of a liquid drop oscillation and a single liquid drop impacting onto a liquid film are conducted. The inherent physics of multiphase drop dynamics are well described.