On the dynamics of near-wall turbulence
Web10 de abr. de 2024 · The dominant near-wall structure of Newtonian turbulence is wavy streamwise vortices. Using direct simulations in channel flow, we illustrate how these are affected by viscoelasticity. We observe occasional nearly quiescent “hibernating” intervals with very weak, and weakly streamwise-dependent structure, separated by intervals of … Web2 de out. de 2024 · The gas-dynamic and heat-exchange behaviours of air flows in gas-dynamic systems have a significant impact on the efficiency and environmental performance of most technical equipment (heat engines, power plants, heat exchangers, etc.). Therefore, it is a relevant task to obtain reliable experimental data and physical …
On the dynamics of near-wall turbulence
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Web21 de abr. de 2004 · The dynamics of the sublayer and buffer regions of wall-bounded turbulent flows are analysed using autonomous numerical simulations in which the outer … Web12 de abr. de 2024 · Dynamic hump is an active control method, which has been proved to be able to suppress laminar flow separation on the suction surface of high-loaded low-pressure turbine (LPT) blades at low Reynolds number (Re). This paper further discusses the effectiveness of dynamic hump with different parameters for flow separation control. …
Web15 de jul. de 2024 · Predicting the near-wall region of turbulence through convolutional neural networks. Modelling the near-wall region of wall-bounded turbulent flows is a … WebAn experimental investigation of near-wall scale interactions in the presence of a deterministic forcing input is presented in this work. The external forcing input was …
WebThe dynamics of the sublayer and buffer regions of wall-bounded turbulent flows are analysed using autonomous numerical simulations in which the outer flow, and on some … Web13 de abr. de 2024 · To study the internal flow characteristics and energy characteristics of a large bulb perfusion pump. Based on the CFX software of the ANSYS platform, the …
Web10 de abr. de 2024 · The experiment was performed in a flow loop, specially designed for the research on wall turbulence and coherent structures in the facilities of the …
WebNumerical experiments on modified turbulent channels are used to differentiate between possible turbulence generation mechanisms in wall bounded flows. It is shown that a … chums caseWeb15 de ago. de 1991 · Abstract. A model of the dynamic physical processes that occur in the near-wall region of a turbulent flow at high Reynolds numbers is described. The hairpin … chums casual trousersWebData-driven dimensionality reduction methods such as proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) have proven to be useful for exploring complex phenomena within fluid dynamics and beyond. A well-known challenge for these techniques is posed by the continuous symmetries, e.g. translations and rotations, of the … detail car cleaning katyWeb7 de mar. de 2024 · To reveal the effects of the boundary layer combustion on the near-wall turbulence and wall fluxes, ... Shi, Y. Tian, J. Le, and F. Zhong, “ Effect of pilot hydrogen on the formation of dynamic flame in an ethylene-fueled scramjet with a cavity,” Phys. Fluids 33, 055130 (2024). chums butterfly curtainsWeb24 de abr. de 2004 · The dynamics of the sublayer and buffer regions of wall-bounded turbulent flows are analysed using autonomous numerical simulations in which the outer … detail chemicals wholesaleWebThe present work will enrich the knowledge of the boundary vorticity dynamics, where some interesting properties of the near-wall Laplacians will be presented for the first time. All the theoretical results are derived from the Navier–Stokes (NS) equations with the no-slip boundary condition, which are valid for flow past any stationary curved wall embedded in … chums casual shoesWeb5 de jun. de 2024 · This suggests rapid interlayer migration in the wall direction, causing increased particle turbulence intensities in near-wall regions. A local flow topology … chums buggy