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| Home > Publications database > Hydrodynamics of immiscible binary fluids with viscosity contrast: A Multiparticle Collision Dynamics approach |
| Conference Presentation (After Call) | FZJ-2021-01460 |
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2021
Abstract: By coupling distinct collision steps in each fluid domain, immiscible binary fluids with different viscosities connected by coarse-grained planer interfaces are realized by multiparticle collision dynamics (MPC). The flow and the stress-viscosity relation of the system are investigated under shear flow, excellently agree with continuum hydrodynamics solution and the analytical theory of MPC. Later, the hydrodynamic mobility coefficients of an embedded colloid close to the fluid-fluid interface are measured, which coincide with hydrodynamic multipole expansion calculations. To validate the length and time scales of hydrodynamics in this model, we explore the corresponding transverse velocity correlations. It is found that the correlations for the fluid regions occupied by one phase are identical to single-phase MPC fluid. In contrast, the transverse modes at the interfacial region can be interpreted by the superposition of both viscous components.
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