Results 11 to 20 of about 208,538 (280)
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
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
Change in drag, apparent slip and optimum air layer thickness for laminar flow over an idealised superhydrophobic surface [PDF]
, 2013 Analytic results are derived for the apparent slip length, the change in drag and the optimum air layer thickness of laminar channel and pipe flow over an idealised superhydrophobic surface, i.e. a gas layer of constant thickness retained on a wall.
A. Busse +11 more
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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
doaj +1 more source
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
openaire +2 more sources
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
doaj +1 more source
Drag reduction induced by superhydrophobic surfaces in turbulent pipe flow [PDF]
, 2018 The drag reduction induced by superhydrophobic surfaces is investigated in a turbulent pipe flow. Wetted superhydrophobic surfaces are shown to trap gas bubbles in their asperities.
Francesco Battista +6 more
core +2 more sources
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
doaj +1 more source
Manifestations of Drag Reduction by Polymer Additives in Decaying, Homogeneous, Isotropic Turbulence [PDF]
, 2006 The existence of drag reduction by polymer additives, well established for wall-bounded turbulent flows, is controversial in homogeneous, isotropic turbulence. To settle this controversy we carry out a high-resolution direct numerical simulation (DNS) of
C. Canuto +5 more
core +3 more sources
'Calving laws', 'sliding laws' and the stability of tidewater glaciers [PDF]
, 2007 A new calving criterion is introduced, which predicts calving where the depth of surface crevasses equals ice height above sea level. Crevasse depth is calculated from strain rates, and terminus position and calving rate are therefore functions of ice ...
Brown +5 more
core +1 more source