A comprehensive SPH model for three-dimensional multiphase interface simulation

• Published in: Computers & fluids 2019-06, Vol.187, p.98-106
• Main Authors: Yang, Qianhong, Yao, Jun, Huang, Zhaoqin, Asif, Mehmood
• Format: Article
• Language: English
• Subjects: Computational fluid dynamics; Computer simulation; Continuous surface force model; Damping; Deformation; Density; Droplets; Exact solutions; Finite element method; Fluid flow; High density ratio; Mathematical models; Meshless methods; Multiphase; Multiphase flow; Shear flow; Smooth particle hydrodynamics; Smoothed particle hydrodynamics; Three dimensional models
• ISSN: 0045-7930; 1879-0747
• DOI: 10.1016/j.compfluid.2019.04.001

•A comprehensive multiphase SPH model is proposed.•A modified viscous term is incorporated into an improved boundary model.•Multiphase cases are tested to demonstrate the correctness of the model. Smoothed particle hydrodynamics is a typical Lagrangian meshless method, which has unique advantages in modelling multiphase phenomena with interface deformation and fragmentation. Current study proposes a comprehensive multiphase SPH model, which takes the advantages of some numerical techniques such as numerical interfacial force and damping technique. An improved boundary model is also introduced to deal with the solid walls. Additionally, the multiphase phenomena are investigated by solving an enhanced continuous surface force (CSF) model. In order to verify the proposed model, the droplet in shear flow is firstly considered and the results are consistent with the analytical solutions. Furthermore, the oscillations of square droplets are simulated under different particle resolutions, density and viscosity ratios. Finally, two and three dimensional bubble rising at high density ratios (up to 1000) are tested.