Results 21 to 30 of about 10,368 (265)

The influence of strongly turbulized liquid flow parameters on the near-wall transitional flows in the boundary layer

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2020
The effect of the scale and the high intensity of incident-flow turbulence in a boundary layer on a smooth plane plate with rounded edge (experiment T3H) under a zero pressure gradient was analyzed.
V.M. Zubarev
doaj   +1 more source

Experimental Study on Time Evolution of Shock Wave and Turbulent Boundary Layer Interactions

open access: yesJournal of Applied Fluid Mechanics, 2020
In this paper, a test system based on the Nano-tracer Planar Laser Scattering (NPLS) technique for studying time evolution of unsteady flow structures was finished.
X. G. Lu   +4 more
doaj  

Definition of Turbulent Boundary-Layer with Entropy Concept

open access: yesMATEC Web of Conferences, 2016
The relationship between the entropy increment and the viscosity dissipation in turbulent boundary-layer is systematically investigated. Through theoretical analysis and direct numerical simulation (DNS), an entropy function fs is proposed to distinguish
Zhao Rui, Rong Jili, Li Haibo, Ren Fang
doaj   +1 more source

On injection-ejection fluid influence through different accelerating porous surfaces on unsteady 2d incompressible boundary layer characteristics [PDF]

open access: yesTheoretical and Applied Mechanics, 2005
Through the porous contour in perpendicular direction, the fluid of the same properties as incompressible fluid in basic flow, has been injected or ejected with velocity who is a function of the contour longitudinal coordinate and time. The corresponding
Ivanović Dečan, Ivanović Vladan
doaj   +1 more source

Advances in the Prediction of the Statistical Properties of Wall-Pressure Fluctuations under Turbulent Boundary Layers

open access: yesFluids, 2022
Analytical or empirical models of the wall-pressure power spectral density under a turbulent boundary layer are often validated on test cases in an incompressible flow regime.
Gabriele Grasso   +2 more
doaj   +1 more source

Direct numerical simulation of a supersonic turbulent boundary layer subject to adverse pressure gradient induced by external successive compression waves

open access: yesAIP Advances, 2019
A freestream Mach 2.9 flat-plate supersonic turbulent boundary layer subject to a “pure” adverse pressure gradient (APG) without the impact of wall curvatures is studied by direct numerical simulation and compared with a benchmark flow with zero pressure
Xu Wang   +4 more
doaj   +1 more source

Selection of boundary conditions for modeling the turbulent exchange processes within the atmospheric surface layer [PDF]

open access: yesКомпьютерные исследования и моделирование, 2018
One- and two-dimensional hydrodynamic models of turbulent transfer within the atmospheric surface layer under neutral thermal stratification are considered.
Ju. V. Muhartova   +3 more
doaj   +1 more source

Influence of the Development History of Nozzle Wall Boundary Layer upon Wave Generation on a Liquid Jet Free Surface

open access: yesJournal of Fluid Science and Technology, 2009
The relation between the development of the wall boundary layer in a convergent nozzle and free surface waves on the emanated liquid jet has been investigated experimentally.
Kazuhiro ITOH, Hiroshige KUMAMARU
doaj   +1 more source

An experimental study on the equilibrium boundary layer subjected to favourable pressure gradient (Effect of pressure gradient on law of the wall)

open access: yesNihon Kikai Gakkai ronbunshu, 2021
Effect of favorable pressure gradient on the wall similarity in turbulent boundary layer has been investigated experimentally. An appropriately adjusted pressure gradient produces an equilibrium boundary layer of which momentum thickness Reynolds number ...
Yudai HIKITA   +3 more
doaj   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

open access: yesFEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee   +7 more
wiley   +1 more source

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