Diffusiophoresis and medium structure control macroscopic particle transport in porous media
Soft Condensed Matter
2023-03-16 v1 Fluid Dynamics
Abstract
In this letter, we show that pore-scale diffusiophoresis of colloidal particles along local salt gradients manifests in the macroscopic dispersion of particles in a porous medium. Despite is transient character, this microscopic phenomenon controls large-scale particle transport by altering their partitioning between transmitting and dead-end pores. It determines the distribution of residence and arrival times in the medium. Depending on the diffusiophoretic mobility, particles can be mobilized from or trapped in dead-end pores, which provides a means for the controlled manipulation of particles in porous media.
Keywords
Cite
@article{arxiv.2303.08761,
title = {Diffusiophoresis and medium structure control macroscopic particle transport in porous media},
author = {Mamta Jotkar and Pietro de Anna and Marco Dentz and Luis Cueto-Felgueroso},
journal= {arXiv preprint arXiv:2303.08761},
year = {2023}
}
Comments
Article: 4 figures, 6 pages. Supplementary Information: 3 figures, 6 pages