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- W2949815221 abstract "The effect of Prandtl number on the evolution of Kelvin-Helmholtz (KH) billows and the amount of mixing they generate is studied through direct numerical simulation (DNS). The results indicate that the time evolution of the rate of mixing through different stages of the life-cycle of KH flow is significantly influenced by the Prandtl number. As the Prandtl number increases, the final amount of mixing increases for Reynolds that are too low to support active three-dimensional motions. This trend is the opposite in sufficiently high Reynolds number KH flows that can overcome viscous effects, and develop significant three-dimensional instabilities. While the mixing generated in the two-dimensional flows, uniform in the span-wise direction, is not significantly dependent on the Prandtl number, the turbulent mixing induced by three-dimensional motions is a function of the Prandtl number. The turbulent mixing efficiency near the end of the turbulence decay phase approaches 0.2, the commonly observed value in the ocean. A smooth transition in mixing is observed by increasing the buoyancy Reynolds number." @default.
- W2949815221 created "2019-06-27" @default.
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- W2949815221 date "2014-03-12" @default.
- W2949815221 modified "2023-09-25" @default.
- W2949815221 title "The effect of Prandtl number on mixing in low Reynolds number Kelvin-Helmholtz billows" @default.
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