Results 31 to 40 of about 3,269,541 (128)

Experimental study of bubble-drag interaction in a Taylor-Couette flow [PDF]

, 2013
This study is an experimental investigation of the interactions between the bubbles, the coherent motion and the viscous drag in a Taylor Couette flow, for the outer cylinder at rest. The cylinder radius ratio is 0.9.
GABILLET, Céline, COLIN, Catherine, FOKOUA, Georges   +2 more
core  

Investigation on superhydrophilic surface with porous structure: Drag reduction or drag increasing

, 2017
In this paper, different apertures of superhydrophilic porous TiO2 films are fabricated by sol-gel method with PEG2000 additive. The drag reduction effect of the films is investigated through experiment of falling-ball method and FEM simulation.
Li Longyang, Tang Lei, Wang Gang, Liu Eryong, Zeng Zhixiang, Xue Qunji   +5 more
core  

Strategies for Reduction of Turbulent Viscous Drag

, 2018
In this talks new (and not so new) ideas and strategies, which may help to reduce turbulent viscous drag, will be discussed. Focal point is the wall bounded flow with its characteristic turbulent boundary layer and associated characteristic turbulent ...
Rütten, Markus
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NUMERICAL ANALYSIS OF HUB AND FUSELAGE INTERFERENCE TO REDUCE HELICOPTER DRAG [PDF]

, 2012
A numerical investigation was carried out to predict the mutual interference between helicopter components. The investigation was based on the solution of RANS equations in three dimensions using unstructured grids.
Khier, Walid
core  

THE RELEVANCE OF LONGITUDINAL AND TRANSVERSE PROTRUSION HEIGHTS FOR DRAG REDUCTION BY A SUPERHYDROPHOBIC SURFACE

, 2015
When riblets were being extensively studied as drag-reduction devices several years ago, the protrusion height was introduced [1] as an important parameter quantifying their effectiveness. The underlying idea is that riblets are small enough that flow in
LUCHINI, Paolo
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Experiment and simulation on air layer drag reduction of high-speed underwater axisymmetric projectile

, 2015
Injection of air could lead to creation of a bubbly mixture or air layer near the surface that can significantly adjust the flow within the turbulent boundary layer. In this paper, stress wave propagation techniques and Split Hopkinson Pressure Bar (SHPB)
Wei YP(魏延鹏), Wu XC(吴小翠), Du TZ(杜特专), Yu XX(于娴娴), Fang X(方欣), Wang YW(王一伟), Huang CG(黄晨光), Wang, YW (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.   +7 more
core   +1 more source

Drag Reduction: Back to Basics [PDF]

, 1975
Aeronautical design engineering for general aviation aircraft considers the iteration of wind tunnel test data are lift, weight, drag, and thrust as the basic balancing factor in drag reduction ...
Nicks, O. W.
core  

Drag modulation by inertial particles in a drag-reduced turbulent channel flow with spanwise wall oscillation

Harmonic oscillations of the walls of a turbulent plane channel flow laden with inertial particles are studied by point-particle direct numerical simulation to improve our understanding of the physical mechanism for friction drag reduction.
Gao, Wei, Parsani, Matteo, Wang, Minmiao
core   +1 more source

Hybrid Polymer-Surfactant Wormlike Micelles for Concurrent Use for Oil Recovery and Drag Reduction. [PDF]

Polymers (Basel), 2023
Kwiatkowski AL, Molchanov VS, Chesnokov YM, Ivankov OI, Philippova OE.   +4 more
europepmc   +1 more source

Turbulent Drag Reduction Research on Biomimetic Surfaces Based on the Microstructural Characteristics of Shark Skin. [PDF]

Biomimetics (Basel)
Gao M, Wei Z, Wu Z, Zhang C, Shen C.
europepmc   +1 more source