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Article Dans Une Revue Physica D: Nonlinear Phenomena Année : 1994

Complex eddy-viscosity: a three-dimensional effect

Résumé

It is shown that the response of spatially periodic three-dimensional flow to weak large-scale momentum perturbation may involve a complex eddy-viscosity. This is in contrast to the eddy-diffusivity which is always positive and to the eddy-viscosity of two-dimensional flow which is real (but not necessarily positive). A simple ''two-and-a-half dimensional'' flow with a complex eddy-viscosity is (sin(x + y - z), 0, sin(x + y - z) + (1/ √3) sin x).

Dates et versions

hal-00546286 , version 1 (14-12-2010)

Identifiants

Citer

Achim Wirth. Complex eddy-viscosity: a three-dimensional effect. Physica D: Nonlinear Phenomena, 1994, 76, pp.312-317. ⟨10.1016/0167-2789(94)90267-4⟩. ⟨hal-00546286⟩

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