منابع مشابه
Numerical Simulation of Nonpenetrative Turbulent Thermal Convection
Nonpenetrative convection Ð in which the lower boundary condition is one of constant heat flux and the upper boundary is insulatedÐ is an idealization of penetrative convection, which finds application in the planetary boundary layer. Three-dimensional, unsteady, ( ) direct numerical simulations 96 = 96 = 128 have been performed of turbulent, nonpene7 trative thermal convection inside a cubical...
متن کاملBreakdown of wind in turbulent thermal convection.
We report experiments on turbulent Rayleigh-Bénard convection of air in a cylindrical large-scale facility with a diameter of 7 meters and Rayleigh numbers up to Ra approximately 10(12). The facility is used to explore the structure of the large-scale circulation for continuously varying aspect ratios between Gamma approximately 1 and Gamma approximately 10. Using autocorrelation functions deri...
متن کاملTurbulent Thermal Convection with an Obstructed Sidewall
We present an experimental study of turbulent convection in a cell with staggered fingers on its sidewall using water as the convecting fluid. Our measurements reveal that Nu , Ra20.27, and that the temperature probability density function (PDF) at the cell center is a double-peaked function which can be fitted by the superposition of two Gaussians. Moreover, it is found that the size of the lo...
متن کاملExtraction of plumes in turbulent thermal convection.
We present a scheme to extract the velocity of buoyant structures in turbulent thermal convection from simultaneous local velocity and temperature measurements. Applying this scheme to measurements taken at positions within the convection cell where the buoyant structures are dominated by plumes, we obtain the temperature dependence of the plume velocity and understand our results using the equ...
متن کاملThermal Convection in Turbulent Flow, Image Synthesis and Heat Animation
This paper focuses on realistic ray-tracing rendering of scenes which integrate participating media. We work on the temperature sensitive index of refraction, in order to deflect the rays' path and thus visualize a scene through heat. We can also visualize three-dimensional convective motions, under the shape of fumes. In this respect, we suggest to solve the NS (Navier-Stokes) equations throug...
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ژورنال
عنوان ژورنال: Scholarpedia
سال: 2019
ISSN: 1941-6016
DOI: 10.4249/scholarpedia.53051