Simulations of Multiphase Flow at Multiple Scales

Explore multiphase flow dynamics across various scales in this virtual seminar presented by Prof. Jos Derksen from the University of Aberdeen. Delve into particle-scale processes and collective behavior, examining phenomena such as drop sliding on solid surfaces and liquid-liquid dispersions. Learn about simulation techniques including molecular dynamics, Lattice Boltzmann Method (LBM), and continuum approaches. Investigate wettability, boundary conditions, and the evolution of film thickness in multiphase systems. Analyze sedimentation, fluidization, and the structure of fluid-solid flows, including co-fluidization of cylinders and spheres. Gain insights into particle kinematics and dynamics, and discover how simulations compare to experimental results in this comprehensive exploration of multiphase flow phenomena.

Intro
Multiphase flow dynamics collective behavior e particle-scale processes
Create a "pore"- two parallel plates a drop on a solid surface, sheared between two plates
Elementary molecular dynamics ...
Lennard-Jones liquid calibrations...
Do the drops slide? ... Yes, they do
Scale-up from "micro" to "meso"
LBM-immiscible liquids - phase fields
Simulating wettability - boundary conditions
Drop sliding on a substrate
Molecular versus continuum simulations
A different boundary condition
Non-equilibrium boundary condition
Liquid-liquid dispersions (emulsions)
Lower Y offset needs higher resolutio
Evolution of film thickness
Coalescence of charged drops
Sedimentation & fluidization
Structure in fluid-solids flow
Reality check for simulations a very neat experiment
Some simulation details
Particle kinematics & dynamics
Co-fluidization: cylinders & spheres
Fluidization of hollow cylinders
Flow inside the hollow cylinders
Anything worth remembering?