Mixing Efficiency across Rayleigh-Taylor and Richtmeyer-Meshkov Fronts
نویسندگان
چکیده
منابع مشابه
Mixing Generated by Rayleigh-taylor and Richtmyer-meshkov Instabilities
We apply the Canuto-Goldman (CG) analytical model to turbulence generated by the class of instabilities which have a power-law growth rate. For the case of Rayleigh-Taylor (RT) instability we compare the results of the model with the experiments of Read and Youngs and find reasonable agreement on the scale size of large eddies: they are predicted to be a0% of the mixing length and are at least ...
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Rayleigh-Taylor mixing is a classical hydrodynamic instability that occurs when a light fluid pushes against a heavy fluid. The two main sources of nonideal behavior in Rayleigh-Taylor (RT) mixing are regularizations (physical and numerical), which produce deviations from a pure Euler equation, scale invariant formulation, and nonideal (i.e., experimental) initial conditions. The Kolmogorov the...
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Scaled experiments on the nonlinear evolution of the RayleighTaylor (RT) and Richtmyer-Meshkov (RM) instabilities are described under a variety, of conditions that occur in nature. At high Reynolds number, the mixi,ng layer grows self-similarly aiAgt* for a constant acceleration (g), and as a power law t*’ 1 for impulsive accelerations US(t) at low and high Mach numbers. The growth coefficients...
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The nonlinear Rayleigh-Taylor (RT) and Richtmyer-Meshkov (RM) instability are investigated by theoretical models based on singlemode and two-bubble physics at all Atwood numbers (A). A potential-flow treatment of single-mode perturbations shows that the late-time RM single mode velocity decreases as v ∼ λ/t, as well as quantifying a two-bubble overtake interaction (“merger”) analogous to that f...
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ژورنال
عنوان ژورنال: Open Journal of Fluid Dynamics
سال: 2015
ISSN: 2165-3852,2165-3860
DOI: 10.4236/ojfd.2015.52017