Controlling the transport of the mixture involving active and passive rods in confined channel

Wang, Zhengjia; Hao, Junhua

doi:10.1039/d3sm00523b

Soft Matter

2023

DOI: 10.1039/d3sm00523b

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Controlling the transport of the mixture involving active and passive rods in confined channel

Zhengjia Wang¹,

Junhua Hao²

Abstract: The transport of the binary mixture of self-propelled rods (SPRs) and passive rods in the asymmetric conjugate periodic channel is studied by dissipative particle dynamics (DPD) simulations. It is found...

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2024

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Cited by 2 publications

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Macrotransport of active particles in periodic channels and fields: Rectification and dispersion

Peng

2024

The Journal of Chemical Physics

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Transport and dispersion of active particles in structured environments, such as corrugated channels and porous media, are important for the understanding of both natural and engineered active systems. Owing to their continuous self-propulsion, active particles exhibit rectified transport under spatially asymmetric confinement. While progress has been made in experiments and particle-based simulations, a theoretical understanding of the effective long-time transport dynamics in spatially periodic geometries remains less developed. In this paper, we apply generalized Taylor dispersion theory to analyze the long-time effective transport dynamics of active Brownian particles (ABPs) in periodic channels and fields. We show that the long-time transport behavior is governed by an effective advection–diffusion equation. The derived macrotransport equations allow us to characterize the average drift and effective dispersion coefficient. For the case of ABPs subject to a no-flux boundary condition at the channel wall, we show that regardless of activity, the average drift is given by the net diffusive flux along the channel. For ABPs, their activity is the driving mechanism that sustains a density gradient, which ultimately leads to rectified motion along the channel. Our continuum theory is validated against direct Brownian dynamics simulations of the Langevin equations governing the motion of each ABP.

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Macrotransport of active particles in periodic channels and fields: Rectification and dispersion

Peng

2024

The Journal of Chemical Physics

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Bulk Condensation by an Active Interface

Kant,

Gupta,

Soni

et al. 2024

Phys. Rev. Lett.

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Controlling the transport of the mixture involving active and passive rods in confined channel

Abstract: The transport of the binary mixture of self-propelled rods (SPRs) and passive rods in the asymmetric conjugate periodic channel is studied by dissipative particle dynamics (DPD) simulations. It is found...

Cited by 2 publications

References 65 publications

Macrotransport of active particles in periodic channels and fields: Rectification and dispersion

Macrotransport of active particles in periodic channels and fields: Rectification and dispersion

Bulk Condensation by an Active Interface

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