Results 31 to 40 of about 23,990 (264)
Drag Reduction by Leidenfrost Vapor Layers [PDF]
Physical Review Letters, 2011 We demonstrate and quantify a highly effective drag reduction technique that exploits the Leidenfrost effect to create a continuous and robust lubricating vapor layer on the surface of a heated solid sphere moving in a liquid. Using high-speed video, we show that such vapor layers can reduce the hydrodynamic drag by over 85%.
Vakarelski, Ivan Uriev +3 more
openaire +3 more sources
Experimental Study on the Drag Reduction of Surfactant and Microgrooves
Chemical Engineering Transactions, 2020 In the drag-reducing surfactant solution, the scale of near-wall vortices could be enlarged, and the drag reduction mechanism of longitudinal microgrooves was related to the scale of near-wall streamwise vortices.
Chonghai Huang +7 more
doaj +1 more source
Drag Reduction And Heating [PDF]
Progress in Canadian Mechanical Engineering, 2018 Paper presented at 2018 Canadian Society of Mechanical Engineers International Congress, 27-30 May 2018. ; An external force is required to maintain the relative movement of horizontal plates. It is shown that this force is reduced when the plates are subject to a spatially distributed heating.
Floryan, Jerzy M. +2 more
openaire +2 more sources
Quantitative Analysis of Drag Reduction Methods for Blunt Shaped Automobiles
Applied Sciences, 2020 In fluid mechanics, drag related problems aim to reduce fuel consumption. This paper is intended to provide guidance for drag reduction applications on cars.
Ferenc Szodrai
doaj +1 more source
A Periodically Rotating Distributed Forcing of Flow over a Sphere for Drag Reduction
Mathematics, 2023 In the present study, we propose a periodically rotating distributed forcing for turbulent flow over a sphere for its drag reduction. The blowing/suction forcing is applied on a finite slot of the sphere surface near the flow separation, and unsteady ...
Donggun Son, Jungil Lee
doaj +1 more source
FEBS Open Bio, EarlyView.The brown marmorated stink bug, Halyomorpha halys, mainly secretes 4‐oxo‐(E)‐2‐hexenal, (E)‐2‐decenal, dodecane and tridecane, a mixture representative of that released by many heteropterans. We demonstrated that H. halys can synthesise these secretory components de novo using dietary glucose.
Haruna Fujimori, Koji Noge
wiley +1 more source
International Journal of Metrology and Quality EngineeringSurface drag reduction technologies can significantly reduce the resistance during ship navigation, enhancing speed, efficiency and adaptability under various operating conditions.
Li Tianjian +5 more
doaj +1 more source
Numerical Study on Drag Reduction of Superhydrophobic Surfaces with Conical Microstructures in Laminar Flow [PDF]
Journal of Applied Fluid MechanicsSuperhydrophobic surfaces have garnered attention for their ability to decrease fluid resistance, which can significantly reduce energy consumption. This study aims to accurately capture critical flow phenomena in a microchannel and explore the internal ...
Y. Xu, C. Ruan, Z. Zhang
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Nihon Kikai Gakkai ronbunshu, 2022 Drag reduction by bubble injection in turbulent boundary layers was investigated using a 36-m-long flat-bottom model ship. The model ship was towed at 8.0 m/s, resulting in a downstream-distance-based Reynolds number as high as 2.9 × 108.
Taiji TANAKA +5 more
doaj +1 more source
[18F]Fluorodeprenyl‐D2 PET as a Tool to Monitor Disease Activity in GAD65‐Ab Autoimmune Encephalitis
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective To evaluate [18F]fluorodeprenyl‐D2 ([18F]F‐DED) positron‐emission tomography (PET) imaging as a biomarker of disease activity in autoimmune encephalitis (AIE) associated with glutamic acid decarboxylase 65 (GAD65) antibodies. Methods [18F]F‐DED PET was performed in 25 GAD65‐AIE patients and 8 controls using dynamic (0–60 min) and ...
Julia S. Dorneich +19 more
wiley +1 more source