Numerical study of a descending sphere in a low reynolds number strongly stratified fluid

Abstract:

The flow generated by a sphere descending uniformly in a linearly stratified diffusive fluid is investigated numerically for different Reynolds (Re) and Froude (F) numbers. The parameters used for the simulations were 10-1 ≤ Re ≤ 10 and 10-2 ≤ F ≤ 102, keeping the Schmidt number, Sc (= 700, typical of sea water) fixed. The results demonstrate drag dependence on viscosity and stratification, suggesting that changes in these parameters would be intimately related to the phenomena of zooplankton vertical movement in the ocean. Copyright © 2008, Kent State University.

Año de publicación:

2008

Keywords:

• Low reynolds number
• Krylov methods
• Stratified fluid
• preconditioning
• MAC method
• Flow past sphere

Fuente:

scopus

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