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Deformation of ambient chemical gradients by sinking spheres

TitleDeformation of ambient chemical gradients by sinking spheres
Publication TypeJournal Article
Year of Publication2020
AuthorsInman B.G, Davies CJ, Torres C.R, Franks PJS
Date Published2020/06
Type of ArticleArticle
ISBN Number0022-1120
Accession NumberWOS:000524630700001
Keywordsboundary layer structure; brunt-vaisala frequency; core; diffusion; flow; fluid flows; fluxes; heat-transfer; mechanics; particle; particles; physics; rossby radii; single spheres; stratified fluid

A sphere sinking through a chemical gradient drags fluid with it, deforming the gradient. The sphere leaves a trail of gradient enhancement that persists longer than the velocity disturbance in the Reynolds , Froude and Peclet regime considered here. We quantify the enhancement of the gradient and the diffusive flux in the trail of disturbed chemical left by the passing sphere using a combination of numerical simulations and scaling analyses.

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