Skin friction and coherent structures within a laminar separation bubble
Sign Up to like & getrecommendations! Published in 2018 at "Experiments in Fluids"
DOI: 10.1007/s00348-018-2651-8
Abstract: We study the Laminar Separation Bubble (LSB) which develops on the suction side of a NACA 0015 hydrofoil by means of a Temperature-Sensitive Paint (TSP), at a Reynolds number of $$1.8\times 10^5$$1.8×105 and angles of… read more here.
Keywords: aoa circ; separation; skin friction; circ ... See more keywords
Effects of the Reynolds number on the mean skin friction decomposition in turbulent channel flows
Sign Up to like & getrecommendations! Published in 2019 at "Applied Mathematics and Mechanics"
DOI: 10.1007/s10483-019-2442-8
Abstract: As the Reynolds number increases, the skin friction has been identified as the dominant drag in many practical applications. In the present paper, the effects of the Reynolds number on the mean skin friction decomposition… read more here.
Keywords: skin friction; friction decomposition; mechanics; reynolds number ... See more keywords
Effects of Pile Residual Loads on Skin Friction and Toe Resistance
Sign Up to like & getrecommendations! Published in 2018 at "Soil Mechanics and Foundation Engineering"
DOI: 10.1007/s11204-018-9506-4
Abstract: In this paper, the causes and mechanisms of residual loads are described and discussed. Methods for measuring pile residual loads in the field are summarized and compared. Specifically, a driven pile and a bored pile… read more here.
Keywords: pile residual; toe resistance; residual loads; skin friction ... See more keywords
On MHD convective flow of Williamson fluid with homogeneous-heterogeneous reactions: A comparative study of sheet and cylinder
Sign Up to like & getrecommendations! Published in 2021 at "International Communications in Heat and Mass Transfer"
DOI: 10.1016/j.icheatmasstransfer.2020.105060
Abstract: Abstract This article discloses a comparative analysis for convective movement of Williamson liquid by a cylinder and sheet. Heat transport mechanism is employed for sheet and cylinder via extra heat factors, convective condition, viscous dissipation,… read more here.
Keywords: sheet cylinder; sheet; cylinder; skin friction ... See more keywords
Skin-friction drag reduction in a channel flow with streamwise-aligned plasma actuators
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Heat and Fluid Flow"
DOI: 10.1016/j.ijheatfluidflow.2017.05.013
Abstract: Abstract Direct Numerical Simulations in a turbulent channel flow at a moderate Reynolds number are performed in order to investigate the potential of Dielectric Barrier Discharge (DBD) plasma actuators for the reduction of the skin-friction… read more here.
Keywords: reduction; plasma actuators; skin friction; aligned plasma ... See more keywords
Measurements of skin-friction of systematically generated surface roughness
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Heat and Fluid Flow"
DOI: 10.1016/j.ijheatfluidflow.2018.04.015
Abstract: Abstract The flow conditions at which a given surface will begin to show the effects of roughness in the form of increased wall shear stress above that of the hydraulically-smooth wall and the behavior of… read more here.
Keywords: surface roughness; surface; spectral slope; measurements skin ... See more keywords
Evolutionary computing to determine the skin friction capacity of piles embedded in clay and evaluation of the available analytical methods
Sign Up to like & getrecommendations! Published in 2020 at "Transportation geotechnics"
DOI: 10.1016/j.trgeo.2020.100372
Abstract: Abstract Deep foundations are very important elements in the routine design of railways and bridges when the loads applied due to these important structures are higher than the bearing capacity of the soil. However, the… read more here.
Keywords: capacity; analytical methods; friction capacity; skin friction ... See more keywords
On the skin friction due to turbulence in ducts of various shapes
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2017.911
Abstract: We consider fully developed turbulence in straight ducts of non-circular cross-sectional shape, for instance a square. A global friction velocity $\overline{u}_{\unicode[STIX]{x1D70F}}$ is defined from the streamwise pressure gradient $|\text{d}p/\text{d}x|$ and a single characteristic length $h$… read more here.
Keywords: overline unicode; reynolds number; friction; turbulence ... See more keywords
Reinforcement learning of control strategies for reducing skin friction drag in a fully developed turbulent channel flow
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2023.147
Abstract: Abstract Reinforcement learning is applied to the development of control strategies in order to reduce skin friction drag in a fully developed turbulent channel flow at a low Reynolds number. Motivated by the so-called opposition… read more here.
Keywords: reinforcement learning; wall; skin friction; control strategies ... See more keywords
Wall skin friction analysis in a hypersonic turbulent boundary layer over a compression ramp
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2024.442
Abstract: Abstract In this paper, direct numerical simulations in hypersonic turbulent boundary layers over a $24^{\circ }$ compression ramp at Mach 6.0 are performed. The wall skin friction and its spanwise non-homogeneity in the interaction region… read more here.
Keywords: skin friction; boundary layer; turbulent boundary; compression ... See more keywords
Revisiting the theory of van Driest: a general scaling law for the skin-friction coefficient of high-speed turbulent boundary layers
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2025.10209
Abstract: Abstract The skin-friction coefficient is a dimensionless quantity defined by the wall shear stress exerted on an object moving in a fluid, and it decreases as the Reynolds number increases for wall-bounded turbulent flows over… read more here.
Keywords: friction coefficient; skin friction; scaling law; friction ... See more keywords