Measurements of the turbulent energy dissipation rate
نویسندگان
چکیده
منابع مشابه
Renormalized expression for the turbulent energy dissipation rate.
Conditional elimination of degrees of freedom is shown to lead to an exact expression for the rate of turbulent energy dissipation in terms of a renormalized viscosity and a correction. The correction is neglected on the basis of a previous hypothesis [W. D. McComb and C. Johnston, J. Phys. A 33, L15 (2000)] that there is a range of parameters for which a quasistochastic estimate is a good appr...
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We periodically modulate a turbulent wind-tunnel flow with an active grid. We find a resonant enhancement of the mean turbulent dissipation rate at a modulation frequency which equals the large-eddy turnover rate. Thus, we find the best frequency to inject energy into a turbulent flow. The resonant response is characterized by the emergence of vortical structures in the flow and depends on the ...
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The turbulent kinetic energy dissipation rate, ε, in tidal seas is maximum at the bottom during full flood and during full ebb, i.e. when tidal currents are strongest. In coastal regions with tides similar to a Kelvin wave, this coincides with high water and low water. If there is a freshwater source at the coast, stratification in such a region will be most stable at high water and least at lo...
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In many Direct Numerical Simulations (DNS) of turbulence researchers inject power into the fluid at large scales and then observe how it “propagates” to the small scales [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]. One such type of stirring is to take the force f(x, t) to be proportional to the projection of the velocity u(x, t) of the flow onto its lowest Fourier modes, while keeping the rate of i...
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 2002
ISSN: 1070-6631,1089-7666
DOI: 10.1063/1.1445422