The turbulent boundary layer is considered to consist of several regions characterized by their water velocity profile. These regions include the viscous sublayer, the log-law region, and the outer region (Fig. 7.2). Sign in to download full-size image 7.2. Law of the wall plot for a turbu...
湍流边界层结构 Turbulent Boundary Layer Structure
A turbulent boundary layer manipulated by outer-layer devices has been studied. Experiments have been conducted in the 0.70 by 0.50 m 2 low speed wind tunnel of the 'Modesto Panetti' Aeronautical Laboratory of the Politecnico di Torino. Mean values and turbulent quantities measured in the natural...
Laser-Doppler velocimetry (LDV) measurements and flow visualizations are used to study a turbulent boundary layer over a smooth wall with transverse square cavities at two values of the momentum thickness Reynolds number ( R θ =400 and 1300). The cavities are spaced 20 element widths apart in...
turbulent boundary layers into the region very close to the surface. The ejection–incursion sequence (Figure 4), commonly called the burst-sweep cycle, occurs in a quasi-periodic manner and it represents the dominant process promoting turbulent exchanges in a boundary layer above a smooth bed (...
This chapter discusses the simple case of the turbulent boundary layer in a constant pressure field and considers the complex problem of the effects of pressure gradients, and variable wall roughness. The concepts of boundary layer phenomena, in general, and turbulent boundary layers, in particular,...
The subject is the theory of flows with friction, and, within that field, particularly the theory of friction layers, or boundary layers. Actual liquids and gaees satisfy the condition of incompressibility rather well if the velocities are not extremely high or, more accurately, if they are ...
The Turbulent Boundary Layer 来自 Elsevier 喜欢 0 阅读量: 437 作者: FH Clauser 摘要: This chapter discusses the simple case of the turbulent boundary layer in a constant pressure field and considers the complex problem of the effects of pressure gradients, and variable wall roughness. The ...
The structure of the turbulent boundary-layer for flows over freshwater biofilms dominated by the diatom Tabellaria flocculosa was investigated. Biofilms were grown on large test plates under flow conditions in an Australian hydropower canal for periods up to 12 months. Velocity-profile measurements ...
Turbulent boundary layer under a solitary wave 期刊名称: J. Fluid Mech 作者: VITTORI, GIOVANNA,BLONDEAUX, PAOLO 年份: 2008年 关键词: Theoretical or Mathematical/ boundary layer turbulence; flow simulation; laminar flow; laminar to turbulent transitions; Navier-Stokes equations; solitons; water/ ...