Results 31 to 40 of about 1,940 (222)

Direct numerical simulation for modification of sinusoidal riblets

Journal of Fluid Science and Technology, 2016
This paper proposes a new riblet configuration. A traditional sinusoidal riblet was modified with the aim of reducing pressure drag. The height of the side wall in the newly configured riblet is lowered toward the node of the sinusoidal curve to reduce ...
Kie OKABAYASHI
doaj   +1 more source

Mitigation of turbulent noise sources by riblets

Journal of Sound and Vibration, 2022
Copyright © 2022 The Authors. A feasibility study is presented on the application of riblets to suppress turbulent pressure sources leading to a reduction in the generation of aerofoil self-noise. It is shown that riblets can reduce skin friction as well as the turbulence intensity inside the boundary layer. In addition, near-wall turbulence structures
Chioma Muhammad, Tze Pei Chong
openaire   +2 more sources

Riblet Drag Reduction Modeling and Simulation

Fluids, 2022
One of the most interesting passive drag reduction techniques is based on the use of riblets or streamwise grooved surfaces. Detailed flow features inside the grooves can be numerically detected only by Direct Numerical Simulations (DNS), still ...
Benedetto Mele
doaj   +1 more source

Direct numerical simulation for investigation on yaw angle effects on riblets

Journal of Fluid Science and Technology, 2017
The yaw angle (φ) effect on riblets are investigated by parametrically conducted direct numerical simulation (DNS). Three configurations are adopted: standard straight riblet, sinusoidal riblet, and modified sinusoidal riblet. The height of the side wall
Kie OKABAYASHI
doaj   +1 more source

A review of drag reduction and heat transfer enhancement by riblet surfaces in closed and open channel flow

International Journal of Thermofluids, 2021
Turbulence and heat transfer are two critical factors in the chain of world energy consumption. Hence, development of more efficient energy transfer techniques in engineering applications through control and optimization of the thermal turbulent boundary
Shima Soleimani, Steven Eckels
doaj   +1 more source

Numerical Investigation of Aerodynamic Noise Reduction of Nonpneumatic Tire Using Nonsmooth Riblet Surface

Applied Bionics and Biomechanics, 2020
Unlike conventional pneumatic tires, the nonpneumatic tires (NPT) are explosion proof and simple to maintain and provide low rolling resistance. At high vehicle speeds, however, the complex airflow produced by the open flexible-spoke structure of NPT ...
Haichao Zhou, Zhen Jiang, Jian Yang, Huihui Zhai, Guolin Wang   +4 more
doaj   +1 more source

Numerical and experimental investigations on drag-reducing effects of riblets

Engineering Applications of Computational Fluid Mechanics, 2021
The numerical simulation and force measurement experiment are conducted in this work. The direct numerical simulation method with high-order schemes is performed to resolve the incompressible turbulent flow over riblets.
Chaoqun Li, Shuo Tang, Yi Li, Zihai Geng
doaj   +1 more source

Problèmes d'insolation. Perspectographe stéréographique (système J. Riblet) appliqué à la détermination de la réduction par les obstacles des durées d'insolation

, 1952
Riblet J. Problèmes d'insolation. Perspectographe stéréographique (système J. Riblet) appliqué à la détermination de la réduction par les obstacles des durées d'insolation. In: Revue de géographie de Lyon, vol. 27, n°4, 1952. pp.
Riblet, Jean
core   +1 more source

Riblet #11 at Vail

, 2022
Date scanned: 2004-06-14.Riblet #11 at ...
Dwyer, Charles F.
core  

Riblet insert grip installation

, 2022
Date scanned: 2004-05-18.Riblet insert grip ...
Dwyer, Charles F.
core