WebThe properties of the structure functions and other small-scale quantities in turbulent Rayleigh-Bénard convection are reviewed, from an experimental, theoretical, and … In fluid mechanics, the Rayleigh number (Ra, after Lord Rayleigh ) for a fluid is a dimensionless number associated with buoyancy-driven flow, also known as free (or natural) convection. It characterises the fluid's flow regime: a value in a certain lower range denotes laminar flow; a value in a higher range, turbulent … See more The Rayleigh number describes the behaviour of fluids (such as water or air) when the mass density of the fluid is non-uniform. The mass density differences are usually caused by temperature differences. … See more Solidifying alloys The Rayleigh number can also be used as a criterion to predict convectional instabilities, such as A-segregates, in the mushy zone of a solidifying alloy. The mushy zone Rayleigh number is defined as: See more • Rayleigh number calculator See more For free convection near a vertical wall, the Rayleigh number is defined as: where: • x is the characteristic length • Rax is the Rayleigh number for characteristic length x • g is acceleration due to gravity See more • Grashof number • Prandtl number • Reynolds number • Péclet number See more
Heat transfer enhancement and reduction in low-Rayleigh number …
WebLaminar and turbulent convective heat transfer in a ventilated and non-ventilated cavity was analyzed by heatlines. Heatlines show that in non-ventilated cavities it is possible to … WebMar 28, 2013 · The Rayleigh number ($\mathit{Ra}$) scaling of the global Bolgiano length scale ${L}_{B, global} $ and the local Bolgiano length scale ${L}_{B, centre} $ in the centre … porsche panamera e hybrid s
Turbulent Rotating Rayleigh–Bénard Convection Annual Review …
WebNov 19, 2024 · In this work, reservoir computing is applied to model the large-scale evolution and the resulting low-order turbulence statistics of a two-dimensional turbulent Rayleigh-Bénard convection flow at a Rayleigh number Ra = 10 7 and a Prandtl number Pr = 7 in an extended spatial domain with an aspect ratio of 6. WebJun 22, 2024 · We present an experimental study of flow structures in turbulent Rayleigh–Bénard convection in annular cells of aspect ratios $$\varGamma =1 ... WebWhen discussing the theoretical aspect, studies typically focus on flow stability transformation [1,2], (from laminar flow to turbulence,) convection state in turbulence [3,4], qualification of the convection’s appearance [5–7], the varying number of Bénard cell vortexes according to the Rayleigh number (Ra) [8,9], and so on. irish channel parade new orleans