Flow reversals in thermally driven turbulence
WebFeb 21, 2024 · Sugiyama K, Ni R Stevens R J A M, et al. Flow reversals in thermally driven turbulence. Phys Rev Lett, 2010, 105: 034503. Article Google Scholar Zhang Y, Huang Y X, Jiang N, et al. Statistics of velocity and temperature fluctuations in two-dimensional Rayleigh-Bénard convection. Phys Rev E, 2024, 96: 023105 WebPDF - We analyze the reversals of the large-scale flow in Rayleigh-Benard convection both through particle image velocimetry flow visualization and direct numerical simulations of …
Flow reversals in thermally driven turbulence
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WebThese corner-flow rolls play a crucial role for the large-scale wind reversal: They grow in kinetic energy and thus also in size thanks to plume detachments from the boundary … WebEddy (fluid dynamics) A vortex street around a cylinder. This can occur around cylinders and spheres, for any fluid, cylinder size and fluid speed, provided that the flow has a Reynolds number in the range ~40 to …
WebApr 5, 2024 · Based on various patterns of particle motion, we find three transport modes of inertial particles which are labeled as the circling transport (CCT) mode, the channel transport (CNT) mode, and the downpour transport (DPT) mode, respectively. WebApr 21, 2015 · After a flow reversal, the odd modes, e.g., (1, 1) and (3, 1), switch sign, but the even modes, e.g., (2, 2), retain their sign. The mixed modes (1, 2) and (2, 1) fluctuate around zero. Using the properties of the modes and their interactions, we show that they form a Klein four-group Z2 × Z2.
WebJan 9, 2024 · Thermal effects Turbulent flows Heat transfer Navier Stokes equations Natural convection Thermal diffusivity ABSTRACT Direct numerical simulation (DNS) of non-slip two dimensional (2D) Rayleigh–Benard convection (RBC) is conducted for a wide range of Rayleigh number ( Ra up to 10 13) at Prandtl number Pr = 0.7 and aspect ratio … WebFlow Reversals in Thermally Driven Turbulence Kazuyasu Sugiyama, 1,3 Rui Ni, 2 Richard J.A.M. Stevens, 1 Tak Shing Chan, 1,2 Sheng-Qi Zhou, 2 Heng-Dong Xi, 2 …
WebApr 1, 1993 · @article{osti_6553407, title = {Thermally driven winds}, author = {Whiteman, C D}, abstractNote = {This presentation will summarize the present state of knowledge on slope and valley wind systems, emphasizing physical concepts and recent gains in understanding from observational programs in various parts of the world. The …
WebSpontaneous and stochastic reversal of large scale flow structure is an intriguing and crucial phenomenon in turbulent Rayleigh-Bénard type natural convection. This paper … little angels high school lucknowWebJul 1, 2011 · We observe large-scale circulation in the form of an ellipse with counter-rotating corner rolls in a classical square RB convection enclosure for Ra ¼ 10 8 and Pr … little angels high school tirupati unviersityWeb•Dynamically driven flowsproduced by the interaction of the large-scale flow with topography •Thermally driven flows(a.k.a. diurnal mountain winds) produced by horizontal contrasts in heating and cooling that arise from topographic and land-surface contrasts •Frequently combined to some extent This Lecture Thermally Driven Mountain Winds little angels high school gwaliorWebJun 1, 2024 · We describe the spectral theory including energy flux and show that the thermally-driven turbulence is similar to hydrodynamic turbulence. We also describe large-scale quantities like... little angels high school logoWebJul 16, 2010 · Search worldwide, life-sciences literature Search. Advanced Search Coronavirus articles and preprints Search examples: "breast cancer" Smith J little angels hickory ncWebNov 10, 2024 · Here, α, ν, and k are the thermal expansion coefficient, kinematic viscosity, and thermal diffusivity of the fluid, respectively; Δ is the temperature difference across the fluid layer of height H; and g is the gravitational acceleration. Pervious studies 7–9 7. R. H. Kraichnan, “ Turbulent thermal convection at arbitrary Prandtl number,” Phys. Fluids 5, … little_angel shop west chester paWebThe LSC is driven by the warm and cold plumes emitted from the unstable thermal boundary layers near the top and bottom conducting plates and is maintained at a steady … little angels highgate