Phoretic flow in a three-dimensional wedge geometry
Abstract
Understanding how chemically induced surface transport generates fluid motion in confined geometries is essential for the rational design of microscale pumping devices and active microfluidic systems. Here we develop a theoretical framework for chemically driven phoretic flows in a three-dimensional wedge geometry in the diffusion-dominated regime. We formulate both the diffusion and hydrodynamic problems using a Fourier-Kontorovich-Lebedev spectral representation, exploiting the translational invariance and radial structure of the wedge. Green's functions for the concentration field are derived for reflecting and mixed reflecting-absorbing boundaries, reducing to finite image-like sums or closed-form expressions for commensurate wedge angles. The resulting slip velocity is then used to construct the three-dimensional Stokes flow through the Papkovich-Neuber representation, yielding explicit spectral solutions for the velocity field. These results establish a Green's-function framework for phoretic pumping in wedge-shaped confinement and provide analytical benchmarks for numerical simulations of chemically driven transport in confined microfluidic systems.
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BibTeX
@misc{daddimoussaider2026phoretic,
title = {{Phoretic flow in a three-dimensional wedge geometry}},
author = {Abdallah Daddi-Moussa-Ider and Semyon Yakubovich and Maciej Lisicki},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2607.29262},
eprint = {2607.29262},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2607.29262},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Phoretic flow in a three-dimensional wedge geometry
AU - Abdallah Daddi-Moussa-Ider
AU - Semyon Yakubovich
AU - Maciej Lisicki
PY - 2026
DA - 2026/10/08
PB - arXiv
DO - 10.48550/arxiv.2607.29262
UR - https://arxiv.org/abs/2607.29262
AB - Understanding how chemically induced surface transport generates fluid motion in confined geometries is essential for the rational design of microscale pumping devices and active microfluidic systems. Here we develop a theoretical framework for chemically driven phoretic flows in a three-dimensional wedge geometry in the diffusion-dominated regime. We formulate both the diffusion and hydrodynamic problems using a Fourier-Kontorovich-Lebedev spectral representation, exploiting the translational invariance and radial structure of the wedge. Green's functions for the concentration field are derived for reflecting and mixed reflecting-absorbing boundaries, reducing to finite image-like sums or closed-form expressions for commensurate wedge angles. The resulting slip velocity is then used to construct the three-dimensional Stokes flow through the Papkovich-Neuber representation, yielding explicit spectral solutions for the velocity field. These results establish a Green's-function framework for phoretic pumping in wedge-shaped confinement and provide analytical benchmarks for numerical simulations of chemically driven transport in confined microfluidic systems.
ER -