Results 21 to 30 of about 897,659 (282)
Analyzing the Efficacy of Nickel Plating Coating in Hydraulic Pipeline Drag Reduction
LubricantsThis study delves into the drag-reducing properties of nickel plating coatings applied to hydraulic pipelines. To investigate the drag reduction characteristics of pipeline coatings, we designed a specialized experimental apparatus to conduct ...
Xue Wang +3 more
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Experimental Study 0f Drag Reduction Phenomena in the Horizontal Tube with Nano SiO2 by Neural Network - Genetic Algorithm [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2021 In this study, nano-silica oxide's effect as a Drag Reducing Agent (DRA) of water flow in a 12.7 and 25.4 mm galvanized pipe was investigated. The studied parameters include Nano silica oxide concentration, Flow rate, temperature, and tube pipe diameter.
Fahimeh Gharekhani +2 more
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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
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Reynolds-Averaged Simulation of Drag Reduction in Viscoelastic Pipe Flow with a Fixed Mass Flow Rate
Journal of Marine Science and Engineering, 2023 A high molecular polymer solution with viscoelasticity has the effect of reducing frictional drag, which is quite practical for energy saving. Effective simulations of viscoelastic flows in a pipeline with a high Reynolds number is realized by incorporating the constitutive equation of viscoelasticity into the k−ε−v′2¯−f turbulence model.
Zhuoyue Li +5 more
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SSRN Electronic Journal, 2022 Abstract In order to better suppress the turbulent burst phenomenon on the surface of the underwater vehicle and improve the drag reduction efficiency of the bionic surface, in this paper, based on the turbulent boundary layer theory, a hydrodynamic model is constructed, and the strip structure and vortex structure of mucus with different ...
Kaisheng Zhang +3 more
openaire +1 more source
Geofluids, 2021 Slick-water can effectively reduce the flow drag of fracturing fluid. Many studies have focused on the drag reduction performance of slick-water in wellbore and perforation, but there has been little research on drag reduction characteristics in fracture
Zhiyu Liu +7 more
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Effect of V-Shaped Groove Microstructure on Blood Flow Resistance in Bionic Artificial Blood Vessels
Applied Bionics and Biomechanics, 2023 This study aims to investigate the blood flow in bionic artificial blood vessels and to reduce the resistance to blood flow, the drag reduction characteristics of V-shaped groove drag reduction microstructures in artificial blood vessel structures were ...
Zhou Li +7 more
doaj +1 more source
Engineering Applications of Computational Fluid Mechanics, 2023 The pantograph is one of the primary sources of aerodynamic drag and noise during the operation of a high-speed train. To investigate the impact of the pantograph fairing on the aerodynamic performance at various train heights, six computational models ...
Hongkang Liu +6 more
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ChemEngineering, 2023 Drag reduction in turbulent flow may be significantly reduced by adding tiny quantities of fiber, polymer, and surfactant particles to the liquid. Different drag-reduction agents have proven to be effective in enhancing the flowability of the liquid when added.
Bashar J. Kadhim +6 more
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Experimental Study of Drag Reduction Phenomena within Pipe Flow in a Closed Circuit System Using Surfactant Additives [PDF]
Engineering and Technology Journal, 2013 Pipe lines and tubes are used throughout the worlds for the economic transportation of crude oil, petroleum derivatives, gas and water. A drag reduction phenomenon within pipe flow in a closed circuit system was studying experimentally using Surfactant ...
S. A. Alramadhni +2 more
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