Lattice Boltzmann Simulations of Finite-Sized Particles in Interfaces
Kevin Connington (The Levich Institute), Taehun Lee (The City College of New York, Mechanical Engineering), Jeffrey Morris (Levich Institute and Dept. of Chemical Engineering, CCNY)
Complex Fluids: Suspensions, Emulsions, and Gels
Tue 4:20 - 5:40
Barus-Holley 160
The presence of solid particles can play an important role in many multiphase/multi-component flows. For example, particles in the interface of an emulsion can act to stabilize the drop, preventing breakup or coalescence. We extended an existing free energy-based multi-component Lattice Boltzmann Method (LBM) to handle the transport of immersed solid particles of a finite size. The multi-component LBM can simulate the property differences encountered in a water-air system while eliminating the unwanted phenomenon of spurious currents at equilibrium. The simulated particles are transported by the fluid according to Newtonian dynamics, where the total force on a particle was computed by the method of Momentum Exchange (ME), as in single-phase flow. However, we introduced a supplemental term to account for the force of the interface on the particle. In this talk, we will validate the inclusion of this forcing term, and demonstrate the capability of the code through simulations of drop impact with immersed solid particles, the rupture of a liquid bridge containing particles, and suspensions of particle-stabilized emulsions.