Theoretical considerations of meandering winds in simplified conditions |
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| Authors: | Antônio G O Goulart Gervásio A Degrazia Otávio C Acevedo Domenico Anfossi |
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| Institution: | (1) Centro de Tecnologia de Alegrete, Unipampa/UFSM, Alegrete, RS, Brazil;(2) Departamento de Física, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil;(3) C. N. R., Istituto di Scienze dell’Atmosfera e del Clima, Torino, Italy |
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| Abstract: | The influence of turbulence on the meandering phenomenon is investigated. The study, based on the three-dimensional Navier–Stokes
equations, shows that when the turbulent fluxes can be neglected an asymptotic solution results. This solution reproduces
a horizontal wind oscillation with an infinite relaxation time. When there is turbulent forcing, on the other hand, a transition
occurs to a new order, characterized by a spatial reorganization, leading to a wind field with a well-defined direction. |
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| Keywords: | Atmospheric turbulence Meandering Navier– Stokes equations Stable boundary layer |
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