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001     891368
005     20210623133418.0
037 _ _ |a FZJ-2021-01460
041 _ _ |a English
100 1 _ |a Tan, Zihan
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111 2 _ |a DPG-Frühjahrstagung (DPG Spring Meeting) BP-CPP-DY-SOE
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245 _ _ |a Hydrodynamics of immiscible binary fluids with viscosity contrast: A Multiparticle Collision Dynamics approach
260 _ _ |c 2021
336 7 _ |a Conference Paper
|0 33
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520 _ _ |a 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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700 1 _ |a Calandrini, Vania
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700 1 _ |a Dhont, Jan K.G.
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700 1 _ |a Naegele, Gerhard
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700 1 _ |a Winkler, Roland G.
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