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 …

(PDF) On the Dynamics of Near-Wall Turbulence - ResearchGate

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 interdisciplinary center of fluid dynamics (NIDF). The flow loop consists of a horizontal 6 in. diameter, 10 m long pipe, operating in a closed system. 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. … chsld meaning https://constancebrownfurnishings.com

Energies Free Full-Text Stationary Gas Dynamics and Heat …

Web5 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 … Web23 de out. de 2013 · Using a variety of techniques, including direct tracking of the structures, it is shown that an important characteristic of wall-bounded turbulence is temporally … WebThe 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 … description of boreal forest

Near-wall turbulence: Physics of Fluids: Vol 25, No 10 - AIP …

Category:Near-wall turbulence: Physics of Fluids: Vol 25, No 10

Tags:On the dynamics of near-wall turbulence

On the dynamics of near-wall turbulence

Near-wall turbulence: Physics of Fluids: Vol 25, No 10

Web23 de out. de 2013 · Using a variety of techniques, including direct tracking of the structures, it is shown that an important characteristic of wall-bounded turbulence is temporally … 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 steady calculation of the three-dimensional model of the pump device is carried out. The numerical simulation results obtained by SST k-ω and RNG k-ε turbulence models are compared …

On the dynamics of near-wall turbulence

Did you know?

Web1 de jan. de 1993 · PDF On Jan 1, 1993, R.M.C. So and others published Near-Wall Turbulent Flows Find, read and cite all the research you need on ResearchGate WebData-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 …

Web25 de jun. de 1999 · It is shown that a cycle exists which is local to the near-wall region and does not depend on the outer flow. It involves the formation of velocity streaks from the … Web1 de jan. de 1984 · One school of thought on the organized coherent structures is the hairpin eddy model in which the turbulent flow near a wall is populated by arch-type or hairpin-like vortices. 1 The initial ...

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 … Web1 de dez. de 1990 · Abstract. The behavior of various terms in the Reynolds-stress transport equations is evaluated in view results of near-wall turbulence characterizations which …

WebIn fluid dynamics, the law of the wall (also known as the logarithmic law of the wall) states that the average velocity of a turbulent flow at a certain point is proportional to the logarithm of the distance from that point to the "wall", or the boundary of the fluid region. This law of the wall was first published in 1930 by Hungarian-American mathematician, aerospace …

Web23 de jul. de 2010 · In near-wall turbulent flows, the probability density function of acceleration is strongly dependent on the distance from the wall. Unexpectedly, the … chsld mgr rossWeb9 de abr. de 2024 · The synthetic turbulence generator (STG) lies at the interface of the Reynolds averaged Navier-Stokes (RANS) simulation and large eddy simulation (LES). This paper presents a STG for the multiple-relaxation-time(MRT) lattice Boltzmann method(LBM) framework at high friction Reynolds numbers, with consideration of near wall modeling. … description of british standard bs 31100Web9 de abr. de 2024 · The synthetic turbulence generator (STG) lies at the interface of the Reynolds averaged Navier-Stokes (RANS) simulation and large eddy simulation (LES). … chsld michèle bohecWebThe 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 … chsld near meWeb10 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 … description of bracken fernWeb8 de mar. de 2005 · This article reviews the literature on the theory of wall turbulence and the correlation of data from the viewpoint of composite expansions. As an interpretive tool, composite expansions have been used explicitly since the time of the introduction of the wake law. Nevertheless, the articles of the pioneer turbulence researchers, Prandtl and … chsld morelWebRelevant bibliographies by topics / Near-wall turbulence. Academic literature on the topic 'Near-wall turbulence' Author: Grafiati. Published: 4 June 2024 Last updated: 15 … description of bora bora