Issue 11, 2024

Lattice Boltzmann simulation of deformable fluid-filled bodies: progress and perspectives

Abstract

With the rapid development of studies involving droplet microfluidics, drug delivery, cell detection, and microparticle synthesis, among others, many scientists have invested significant efforts to model the flow of these fluid-filled bodies. Motivated by the intricate coupling between hydrodynamics and the interactions of fluid-filled bodies, several methods have been developed. The objective of this review is to present a compact foundation of the methods used in the literature in the context of lattice Boltzmann methods. For hydrodynamics, we focus on the lattice Boltzmann method due to its specific ability to treat time- and spatial-dependent boundary conditions and to incorporate new physical models in a computationally efficient way. We split the existing methods into two groups with regard to the interfacial boundary: fluid–structure and fluid–fluid methods. The fluid–structure methods are characterised by the coupling between fluid dynamics and mechanics of the flowing body, often used in applications involving membranes and similar flexible solid boundaries. We further divide fluid–structure-based methods into two subcategories, those which treat the fluid–structure boundary as a continuum medium and those that treat it as a discrete collection of individual springs and particles. Next, we discuss the fluid–fluid methods, particularly useful for the simulations of fluid–fluid interfaces. We focus on models for immiscible droplets and their interaction in a suspending fluid and describe benchmark tests to validate the models for fluid-filled bodies.

Graphical abstract: Lattice Boltzmann simulation of deformable fluid-filled bodies: progress and perspectives

Article information

Article type
Review Article
Submitted
06 12月 2023
Accepted
20 2月 2024
First published
21 2月 2024
This article is Open Access
Creative Commons BY license

Soft Matter, 2024,20, 2419-2441

Lattice Boltzmann simulation of deformable fluid-filled bodies: progress and perspectives

D. P. F. Silva, R. C. V. Coelho, I. Pagonabarraga, S. Succi, M. M. Telo da Gama and N. A. M. Araújo, Soft Matter, 2024, 20, 2419 DOI: 10.1039/D3SM01648J

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