Flow reversals in thermally driven turbulence
WebJul 16, 2010 · Flow reversals in thermally driven turbulence Phys Rev Lett. 2010 Jul 16;105(3) :034503. doi ... We analyze the reversals of the large-scale flow in Rayleigh … WebWe analyze the reversals of the large-scale flow in Rayleigh-Bénard convection both through particle image velocimetry flow visualization and direct numerical simulations of …
Flow reversals in thermally driven turbulence
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WebFeb 27, 2024 · The phenomenology of RBC should apply to other flows where the buoyancy feeds the kinetic energy, e.g. bubbly turbulence and fully-developed Rayleigh Taylor instability. This paper also covers several models that predict the Reynolds and Nusselt numbers of RBC. WebJul 16, 2010 · Abstract. We analyze the reversals of the large-scale flow in Rayleigh-Bénard convection both through particle image velocimetry flow visualization and direct numerical simulations of the underlying Boussinesq equations in a (quasi-) two …
WebJan 1, 2024 · Flow Reversals in Thermally Driven Turbulence. Article. Full-text available. Jul 2011; Rui Ni; Richard J. A. M. Stevens; Kazuyasu Sugiyama; D. Lohse; We analyze the reversals of the large-scale ... WebWe describe the spectral theory including energy flux and show that the thermally-driven turbulence is similar to hydrodynamic turbulence. We also describe large-scale …
WebApr 1, 2016 · Abstract Direct numerical simulation and laboratory experiments are used to investigate turbulent convection beneath a horizontal ice–water interface. Scaling laws are derived that quantify the dependence of the melt rate of the ice on the far-field temperature of the water under purely thermally driven conditions. The scaling laws, the simulations, … Web2 days ago · It is found that the flow reversal can be promoted at a Rayleigh number around 10⁷. ... We describe the spectral theory including energy flux and show that the thermally-driven turbulence is ...
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.
WebSpontaneous and stochastic reversal of large scale flow structure is an intriguing and crucial phenomenon in turbulent Rayleigh-Bénard type natural convection. This paper proposes a new control approach to eliminate the reversals through stabilising the corner flows using two small sidewall controllers. granite city gamesWebRayleigh-Bénard convection (RBC), a fluid layer heated from below and cooled from above, is an ideal model for the study of thermally driven turbulent flows ( 5 – 7 ). The main challenge for thermal turbulence studies is to explore the flow dynamics and heat transfer of the system in a wide range of the control parameters. granite city gas pricesWebApr 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 … chinhoyi university masters programmes 2023WebM. K. Verma, S. C. Ambhire, and A. Pandey, Flow reversals in turbulent convection with free-slip walls, Phys. Fluids, 27, 047102 (2015). PDF A. Kumar and M. K. Verma, Shell model for buoyancy-driven turbulence, Phys. Rev. E 91, 043014 (2015). PDF chinhoyi university of technology accountsWebAs examples for turbulent flow where buoyancy is important and at the same time can easily be tuned, we take thermal convection, namely Rayleigh–Bénard (RB) ... Our … granite city gatewayWebWe analyze the reversals of the large-scale flow in Rayleigh-Bénard convection both through particle image velocimetry flow visualization and direct numerical simulations of the underlying Boussinesq equations in a (quasi-) two-dimensional, rectangular geometry of aspect ratio 1. For medium Prandtl number there is a diagonal large-scale convection roll … granite city garageWebJun 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... granite city franklin