NUMERICAL SIMULATION OF NONPENETRATIVE TURBULENT THERMAL CONVECTION
نویسندگان
چکیده
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 کاملDirect numerical simulation of turbulent rotating Rayleigh–Bénard convection
The influence of rotation on turbulent convection is investigated with direct numerical simulation. The classical Rayleigh-Bénard configuration is augmented with steady rotation about the vertical axis. Correspondingly, characterization of the dynamics requires both the dimensionless Rayleigh number Ra and the Taylor number Ta. With increasing Ta the root-mean-square (rms) velocityvariations ar...
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 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 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 کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Numerical Heat Transfer, Part A: Applications
سال: 1999
ISSN: 1040-7782,1521-0634
DOI: 10.1080/104077899275100