Work

Exploring buoyancy-driven effects in chemo-hydrodynamic oscillations sustained by bimolecular reactions

Year: 2024

Type: article

Abstract: Exotic dynamics, previously associated only with reactions involving complex kinetics, have been observed even with simple bimolecular reactions A + B → C, when coupled with hydrodynamical flows. Numerical studies in two-dimensional reactors have shown that oscillatory dynamics can emerge from an antagonistic coupling between chemically-driven buoyancy and Marangoni convective flows, induced by changes in density and surface tension, respectively, as the reaction occurs. Here, we investigate reactions increasing both surface tension and density, leading to a cooperative coupling between the flows and show how, in this configuration, buoyancy-driven contribution dampens spatio-temporal oscillations of concentration. We finally identify the key parameters controlling the onset and persistence of the oscillatory instability, namely the density and surface tension gradients, and the systems height.

Source: Physical Chemistry Chemical Physics

DOI: 10.1039/d4cp03617d

Authors: Adam Bigaj, Marcello A. Budroni, Laurence Rongy

Institutions: Université Libre de Bruxelles, University of Sassari

Language: English

Topic: Nonlinear Dynamics and Pattern Formation

Subfield: Computer Networks and Communications

Field: Computer Science

Domain: Physical Sciences

Open Access status: bronze

Funders: Fonds De La Recherche Scientifique - FNRS, Università degli Studi di Sassari

Award: G6220911914