Results 31 to 40 of about 8,471 (240)

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

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

Combinatorial functions of two chimeric antibodies directed to human CD4 and one directed to the a-chain of the human interleukin-2 receptor [PDF]

, 1992
The general feasibility of chimerization of monoclonal antibodies (mAbs) has already been shown for a large number of them. In order to evaluate in vitro parameters relevant to immunosuppressive therapy, we have chimerized and synthesized two anti-CD4 ...
Flieger, Dimitri, Kaluzab, Brigitte, Lenz, Helmut, Reiter, Christian, Rieber, Ernst Peter, Riethmüller, Gert, Scheuer, Werner, Schwirzke, Marina, Weidle, Ulrich H., Weiss, Elisabeth H., Weissenhorn, Winfried   +10 more
core   +1 more source

Skin friction drag reduction over staggered three dimensional cavities [PDF]

, 2019
The effect of three-dimensional staggered circular cavities on a zero-pressure gradient incompressible turbulent boundary layer was studied. Two key parameters were varied, being the ratio of the diameter, d, to the depth, h, of the cavity, d/h and the ...
Atkin, C.J., Gowree, E. R., Jagadeesh, C.   +2 more
core   +3 more sources

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

A viscous vortex model for predicting the drag reduction of riblet surfaces

Journal of Fluid Mechanics
This paper introduces a viscous vortex model for predicting the optimal drag reduction of riblet surfaces, eliminating the need for expensive direct numerical simulations (DNSs) or experiments. The footprint of a typical quasi-streamwise vortex, in terms
J. Wong, C. J. Camobreco, R. Garc´ıa-Mayoral, N. Hutchins, D. Chung, 𝑦 min, Max, 𝑧, 𝑧 min   +8 more
semanticscholar   +1 more source

Aerodynamic Drag Reduction on Speed Skating Helmet by Surface Structures

Applied Sciences, 2022
The aerodynamic drag for speed skating helmets with surface structures was investigated in this work by using numerical and experimental methods. Computational fluid dynamic (CFD) research was performed to analyze the detail of the flow field around the ...
Yanqing Wang, Ding Weng, Yuju Wei, Yuan Ma, Lei Chen, Jiadao Wang   +5 more
doaj   +1 more source

High-fidelity surface flow data-driven aerodynamic solution strategy for non-smooth configurations- Study ofcompressor cascade with micro riblet surface

The Physics of Fluids, 2022
In this paper, a new aerodynamic solution strategy for non-smooth configurations is proposed based on the wall modification model by machine learning to perform numerical simulations, rather than directly describing the global flow field with massive ...
Liyue Wang, Cong Wang, Xinyue Lan, Gang Sun, Bo You, Yongjian Zhong, Yan Hu   +6 more
semanticscholar   +1 more source

Using Bio-Replicated Forming Technologies to Fabricate Shark-Skin Surface

Brazilian Archives of Biology and Technology, 2018
Shark-skin surfaces show the non-smoothness characteristics due to the presence of riblet structures. In this work, biomimetic shark-skins were prepared by means of different bio-replicated forming techniques.
Pu Xia, Li Guangji, Huang Hanlu, Liu Yunhong, Muhammad Aqeel Ashraf   +4 more
doaj   +1 more source

Controllable deformation based self‐adaptive drag reduction for complex surface

Biosurface and Biotribology, 2023
Reduction of energy consumption and improvement of cruising speed are greatly necessary for underwater vehicles. Previously, regular riblets have been machined and the drag reduction has been verified; however, the riblet parameters are not adjusted like
Dengke Chen, Xianxian Cui, Huawei Chen
doaj   +1 more source