Results 21 to 30 of about 208,538 (280)
Experimental investigation of yaw-angle effects on drag reduction rate for trapezoidal riblets
Experimental investigation of yaw-angle effects on drag reduction rate for trapezoidal ribletsPhysical characteristics: Original contains color illustrations 形態 ...
Ayumu Inasawa +4 more
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Increasing flow capacity and reducing drag in microtubes using drag-reducing polymer [PDF]
Iranian Journal of Chemical Engineering, 2020 Decreasing pressure losses in microtubes is an important subject, especially when increase in flow capacity is required. In the same pumping power, decreasing the pressure drops is coincides with increasing the fluid flow rate passing through a microtube.
M.H. Akbari, M. Rahimi, H.R. Karami
doaj +1 more source
Experimental investigations on drag-reduction characteristics of bionic surface with water-trapping microstructures of fish scales [PDF]
, 2018 Biological surfaces with unique wettability in nature have provided an enormous innovation for scientists and engineers. More specifically, materials possessing various wetting properties have drawn considerable attention owing to their promising ...
Jiao, Zhibin +5 more
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Drag Reduction Characteristics of Bionic Structure Composed of Grooves and Mucous Membrane Acting on Turbulent Boundary Layer [PDF]
Journal of Applied Fluid Mechanics, 2022 The biological surface structure comprising fish scales and a mucous membrane exhibits good turbulent drag reduction ability. Based on this structure, a bionic frictional drag reduction model composed of a grooved structure and mucous membrane was ...
K. Zhang +4 more
doaj +1 more source
Applied Sciences, 2020 The resistance of ordinary potato digging shovels can increase dramatically when used in a clay soil because of the adhesion between the soil and shovel. In this paper, a new type of bionic potato digging shovel was designed to decrease adhesion.
Junwei Li +4 more
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Xibei Gongye Daxue Xuebao, 2022 Turbulent drag reduction has always been a hot issue in fluid mechanics. Among various turbulent drag reduction methods, riblets has attracted wide attention due to its simple structure and convenient application.
DU Shuya, SANG Weimin, PANG Run
doaj +1 more source
Estimation of Pressure Drop of Single-Phase Flow in Horizontal Long Pipes Using Artificial Neural Network [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2022 Large-pressure drops and drag along the pipe route are the problems with fluid transfer lines. For many years, various methods have been employed to reduce the drag in fluid transmission lines.
Fahime Gharekhani +2 more
doaj +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
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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
Changes in turbulent dissipation in a channel flow with oscillating walls
, 2012 Harmonic oscillations of the walls of a turbulent plane channel flow are studied by direct numerical simulations to improve our understanding of the physical mechanism for skin-friction drag reduction. The simulations are carried out at constant pressure
Batchelor +8 more
core +1 more source