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Article Dans Une Revue Physics of Fluids Année : 2003

Nonvertical ascension or fall of a free sphere in a Newtonian fluid

Résumé

It is shown that the system represented by a free sphere ascending or falling in a Newtonian fluid under the action of gravity buoyancy undergoes a regular, symmetry breaking bifurcation making the trajectory deviate from the vertical direction. The instability threshold expressed in terms of the asymptotic Reynolds number lies below that of a fixed sphere wake. The instability is shown to saturate and reach a fixed point corresponding to a straight oblique ascension fall.

Dates et versions

hal-01447015 , version 1 (26-01-2017)

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Mathieu Jenny, Gilles Bouchet, Jan Dušek. Nonvertical ascension or fall of a free sphere in a Newtonian fluid. Physics of Fluids, 2003, 15 (1), pp.L9 - L12. ⟨10.1063/1.1529179⟩. ⟨hal-01447015⟩
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