Anisotropic flow in striped superhydrophobic channels

Abstract

We report results of dissipative particle dynamics simulations and develop a semi-analytical theory of an anisotropic flow in a parallel-plate channel with two superhydrophobic striped walls. Our approach is valid for any local slip at the gas sectors and an arbitrary distance between the plates, ranging from a thick to a thin channel. It allows us to optimize area fractions, slip lengths, channel thickness and texture orientation to maximize a transverse flow. Our results may be useful for extracting effective slip tensors from global measurements, such as the permeability of a channel, in experiments or simulations, and may also find applications in passive microfluidic mixing.

11 pages, 10 figures, submitted to J. Chem. Phys

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Cited by in corpus (10)

• Influence of the enclosed fluid on the flow over a microstructured surface in the Cassie state
• Electro-hydrodynamics near Hydrophobic Surfaces
• Effective slip-length tensor for a flow over weakly slipping stripes
• Flow past superhydrophobic surfaces with cosine variation in local slip length
• Flows and mixing in channels with misaligned superhydrophobic walls
• An efficient dissipative particle dynamics-based algorithm for simulating electrolyte solutions
• Computer Simulations of Charged Colloids in Alternating Electric Fields
• Boundary conditions at the gas sectors of superhydrophobic grooves
• Effective slippage on superhydrophobic trapezoidal grooves
• Lattice-Boltzmann simulations of the drag force on a sphere approaching a superhydrophobic striped plane