Results 11 to 20 of about 265,857 (305)
Drag reduction by compressible bubbles [PDF]
Physical Review E, 2006 Drag reduction by bubbles in stationary turbulent flows is sensitive to the compressibility of the bubbles. Without this dynamical effect the bubbles only renormalize the fluid density and viscosity, an effect that by itself can only lead to a small percentage of drag reduction. We show in this paper that the dynamics of bubbles and their effect on the
T S, Lo +2 more
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The influence of wall roughness on bubble drag reduction in Taylor-Couette turbulence [PDF]
, 2018 We experimentally study the influence of wall roughness on bubble drag reduction in turbulent Taylor-Couette flow, i.e.\ the flow between two concentric, independently rotating cylinders.
Bakhuis, Dennis +5 more
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Numerical Study of Combined Drag Reduction Bases on Vortex Generators and Riblets for the Ahmed Body using IDDES Methodology [PDF]
Journal of Applied Fluid Mechanics, 2022 The flow fields around vehicle drag reduction devices are three-dimensional, complicated, and unsteady. Meanwhile, the small scale of the drag reduction device brings more challenges to the simulation. An Improved Delayed Detached Eddy Simulation (IDDES)
X. Yang, Y. Hu, Z. Gong, J. Jian, Z. Liu
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Simple model for drag reduction [PDF]
Physical Review E, 2003 Direct Numerical Simulations established that the FENE-P model of viscoelastic flows exhibits the phenomenon of turbulent drag reduction which is caused in experiments by dilute polymeric additives. To gain analytic understanding of the phenomenon we introduce in this Letter a simple 1-dimensional model of the FENE-P equations.
Benzi, Roberto, Procaccia, Itamar
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Study on Cruise Drag Characteristics of Low Drag Normal Layout Civil Aircraft
Xibei Gongye Daxue Xuebao, 2020 This paper focus on the wing shape related drag reduction measures of normal layout civil aircraft, through the drag reduction to improve the aircraft performance.
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Current state and prospects on applications of ship drag reduction using air lubrication
Zhongguo Jianchuan Yanjiu, 2023 With the implementation of new carbon reduction rules for international shipping, as well as the domestic "peak carbon and carbon neutrality" strategy, the innovative air lubrication drag reduction technology for ship energy-saving and carbon reduction ...
Shijie QIN +4 more
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Modelling, 2022 The aerodynamic efficiency of trucks is very low because of their non-streamlined box shape, which is subject to practical constraints, leaving little room for improvement in terms of aerodynamic efficiency.
Terrance Charles, Zhiyin Yang
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AIP Advances, 2021 In this paper, biomimetic spines on puffer skin were taken as the study object, and numerical simulation was used to study the effect of the spinal arrangement on drag reduction characteristics.
Xiaoming Feng +4 more
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Investigation of a drag reduction on a circular cylinder in rotary oscillation [PDF]
, 2001 Drag reduction in two-dimensional flow over a circular cylinder, achieved using rotary oscillation, was investigated with computational simulations. In the experiments of Tokumaru & Dimotakis (1991), this mechanism was observed to yield up to 80% drag ...
Leonard, A., Shiels, D.
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Numerical Simulation of Supersonic Carman Curve Bodies with Aerospike
International Journal of Aerospace Engineering, 2021 Drag reduction is one of the important problems for the supersonic vehicles. As one of the drag reduction methods, aerospike has been used in some equipment because of its good drag reduction effect.
HaiLong Zhao +5 more
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