Stochastic Rotation Dynamics simulations of wetting multi-phase flows
arXiv:1601.08048 · doi:10.1016/j.jcp.2016.03.066
Abstract
Multi-color Stochastic Rotation Dynamics (SRDmc) has been introduced by Inoue et al. as a particle based simulation method to study the flow of emulsion droplets in non-wetting microchannels. In this work, we extend the multi-color method to also account for different wetting conditions. This is achieved by assigning the color information not only to fluid particles but also to virtual wall particles that are required to enforce proper no-slip boundary conditions. To extend the scope of the original SRDmc algorithm to e.g. immiscible two-phase flow with viscosity contrast we implement an angular momentum conserving scheme (SRDmc+). We perform extensive benchmark simulations to show that a mono-phase SRDmc fluid exhibits bulk properties identical to a standard SRD fluid and that SRDmc fluids are applicable to a wide range of immiscible two-phase flows. To quantify the adhesion of a SRDmc+ fluid in contact to the walls we measure the apparent contact angle from sessile droplets in mechanical equilibrium. For a further verification of our wettability implementation we compare the dewetting of a liquid film from a wetting stripe to experimental and numerical studies of interfacial morphologies on chemically structured surfaces.
preprint submitted to Journal of Computational Physics
References in corpus (13)
- Hydrodynamic interactions and Brownian forces in colloidal suspensions: Coarse-graining over time and length-scales
- Simulation of Claylike Colloids
- Hydrodynamic and Brownian Fluctuations in Sedimenting Suspensions
- Transport coefficients of off-lattice mesoscale-hydrodynamics simulation techniques
- Relevance of angular momentum conservation in mesoscale hydrodynamics simulations
- Dynamic correlations in stochastic rotation dynamics
- How does confinement affect the dynamics of viscous vesicles and red blood cells?
- Mesoscale simulations of polymer dynamics in microchannel flows
- Stress Tensors of Multiparticle Collision Dynamics Fluids
- Thermostat for non-equilibrium multiparticle collision dynamics simulations
- Flow Generation by Rotating Colloids in Planar Microchannels
- Transport coefficients of dissipative particle dynamics with finite time step
- Stochastic Rotation Dynamics for Nematic Liquid Crystals