WebThe present findings open a new avenue on the exploration of high–Rayleigh number turbulent thermal convection and will improve the understanding of the flow dynamics … WebApr 9, 2024 · We present spatially and temporally resolved velocity and acceleration measurements of turbulent Rayleigh–Bénard convection (RBC) in the entire fluid sample of square horizontal cross section with length \(L=320\) mm and height \(H=20\) mm, resulting in an aspect ratio of \(\Gamma =H/L=16\).The working fluid was water with a Prandtl …
Investigation of turbulent superstructures in Rayleigh–Bénard ...
WebNov 4, 2024 · Abstract. A direct numerical simulation of rotating Rayleigh–Bénard convection (RBC) for different fluids (Pr=0.015,0.7,1,7,20, and 100) in a cylindrical cell of aspect ratio Γ=0.5 is carried out in this work. The effect of rotation on the heat transfer rate, flow structures, their associated dynamics, and influence on the boundary layers are … WebMar 1, 2015 · An experimental study of thermal convection in a porous medium investigates the heat transfer across a horizontal layer heated from below at high Rayleigh number. … greentree townhouses
Processes Free Full-Text Higher Order Accurate Transient …
WebFeb 9, 2024 · In this paper, the classical Rayleigh–Bénard convection model is considered and solved numerically for extremely large viscosity variations (i.e., up to $$10^{30}$$ 10 30 ) across the mantle at a high Rayleigh number. The Arrhenius form of viscosity is defined as a cut-off viscosity function. The effects of viscosity variation and viscous dissipation on … WebKeywords: mantle convection, high Rayleigh number, infinite Prandtl number, Nusselt number, spherical shell 1. Introduction The physical and chemical phenomena occurring on the surface and in the interior of the Earth are mainly con-trolled by the convective motion in the mantle. Mantle convection has many complex aspects, such as internal WebJun 4, 1998 · Thermal plumes in Rayleigh–Bénard convection have been observed to occur with strong vertical component of vorticity, resulting in spiraling hot updrafts and cold downdrafts. Results from two different simulations at Rayleigh numbers 9800 and 33 000 times the critical Rayleigh number close to the boundaries show rapid increase in the … greentree toyota collision