Results 31 to 40 of about 140,231 (211)
Spectral link of the generalized Townsend-Perry constants in turbulent boundary layers
Physical Review Research, 2021 We propose a first minimal theory for boundary layer turbulence that captures very well the profile of the mean-square velocity fluctuations in the streamwise direction and give a quantitative prediction of the Townsend-Perry constants.
Björn Birnir +3 more
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Theoretical and Applied Mechanics Letters, 2022 Large-scale secondary motions are known to occur in turbulent flows over surfaces with spanwise roughness heterogeneity. Numerical studies often use adjacent high- and low-roughness longitudinal strips to investigate these secondary rolls in boundary ...
Ali Amarloo +2 more
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Hydrodynamics in Two-Phase Turbulent Boundary Layers
Journal of Applied Fluid Mechanics, 2018 The corrections for log law must be taken into account the presence of bubbles in the two phase turbulent boundary layer. In the present study, a logarithmic law for the wall based on the supposition of additional turbulent viscosity associated with ...
M. Dhahri, H. Aouinet
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DNS Study of Effects of Suddenly-Vanishing Wall Heating in Turbulent Boundary Layer
Journal of Thermal Science and Technology, 2012 The objective of this study is to investigate a thermal field in the turbulent boundary layer by means of direct numerical simulation (DNS), in which the wall heating has suddenly vanished in the downstream region, i.e., the wall is heated by a constant ...
Hirofumi HATTORI +2 more
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AIP Advances, 2022 High-speed and low-speed streak structures in the near wall region of a turbulent boundary layer with a Mach number of 3 are experimentally examined by employing the spatiotemporally resolved nanoparticle plane laser scattering technique.
Junhao Han, Lin He, Zhengbang Wu
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Particle-Laden Two-Phase Boundary Layer: A Review
AerospaceThe presence of solid particles (or droplets) in a flow leads to a significant increase in heat fluxes, the occurrence of chemical reactions, and erosive surface wear of various aircraft moving in the dusty (or rainy) atmosphere of Earth or Mars.
Aleksey Yu. Varaksin, Sergei V. Ryzhkov
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Turbulent boundary layer equations [PDF]
Comptes Rendus. Mathématique, 2002 We study a boundary layer problem for the Navier–Stokes-alpha model obtaining a generalization of the Prandtl equations which we conjecture to represent the averaged flow in a turbulent boundary layer. We study the equations for the semi-infinite plate, both theoretically and numerically.
openaire +3 more sources
Analytic Model of the Universal Structure of Turbulent Boundary Layers
, 2006 Turbulent boundary layers exhibit a universal structure which nevertheless is rather complex, being composed of a viscous sub-layer, a buffer zone, and a turbulent log-law region.
L'vov, Victor S. +2 more
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Turbulent dissipation in the boundary layer of precession-driven flow in a sphere
AIP Advances, 2023 The energy dissipation in a uniform vorticity flow, such as the flow in a precessing spheroid or the one associated with the earth’s free core nutation, is mainly confined to the boundary layers.
Sheng-An Shih +3 more
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Spectral characteristics of turbulent boundary layers – comparison of Particle Image Velocimetry and Thermal Anemometry [PDF]
EPJ Web of Conferences, 2019 Flow in turbulent boundary layers over various rough surfaces was measured by the time-resolved particle image velocimetry and the thermal anemometry. The experimental methods showed very good agreement in both mean and spectral characteristics taking ...
Jurčáková Klára +3 more
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