Results 11 to 20 of about 2,751,374 (249)

Parameterization of Sea Surface Drag Coefficient for All Wind Regimes Using 11 Aircraft Eddy-Covariance Measurement Databases

Atmosphere, 2021
The drag coefficient is essential for calculating the aerodynamic friction between air and sea. In this study, we regress a set of relationships between the drag coefficient and the wind speed for different wind ranges using an observational dataset that
Zhiqiu Gao, Shaohui Zhou, Jianbin Zhang, Zhihua Zeng, Xueyan Bi   +4 more
doaj   +1 more source

A drag coefficient model for Lagrangian particle dynamics relevant to high-speed flows

International Journal of Heat and Fluid Flow, 2020
A blended drag coefficient model is constructed using a series of empirical relations based on Reynolds number, Mach number, and Knudsen number. When validated against experiments, the drag coefficient model produces matching values with a standard ...
Raghava S. C. Davuluri, S. Bailey, K. A. Tagavi, Alexandre Martin   +3 more
semanticscholar   +1 more source

Enhancing the Dynamic Stability of Pylons via Their Drag and Lift Coefficients by Finite Volume Method

Buildings, 2023
This study aimed to estimate the drag and lift coefficients of the long-span bridge pylon using the finite volume method (FVM). The k-ω turbulence model was applied to analyze the behavior of wind flow around the pylon, yielding drag and lift coefficient
Van My Nguyen, Van Than Chau
doaj   +1 more source

Bottom Drag Variations Under Waves and Currents: A Case Study on a Muddy Deposit off the Shandong Peninsula

Frontiers in Earth Science, 2022
Bottom drag coefficient is one of the key parameters in quantifying shelf hydrodynamics and sediment transport processes. It varies markedly due to dynamic forcing and bed type differences, so a set of empirical values have been used for beds of coarse ...
Fukang Qi, Zhiqiang Liu, Zhiqiang Liu, Jingping Xu, Jingping Xu   +4 more
doaj   +1 more source

Aerodynamic study of three cars in tandem using computational fluid dynamics

Journal of Mechanical Engineering and Sciences, 2021
Aerodynamics of vehicles account for nearly 80% of fuel losses on the road. Today, the use of the Intelligent Transport System (ITS) allows vehicles to be guided at a distance close to each other and has been shown to help reduce the drag coefficients of
H. Abdul-Rahman , H. Moria , M.R. Rasani   +2 more
doaj   +1 more source

Drag coefficient of vertically moving popcorns [PDF]

Revista Brasileira de Ensino de Física
To take the students attention in physics lectures is always a challenge. The projectile motion is not an exception. Then, study of popcorn motion can be a way to introduce and motivate the students in this subject.
Eduardo do Carmo, Marcelo Goncalves Hönnicke   +1 more
doaj   +1 more source

Vortex shedding, flow separation, and drag coefficient in the flow past an ellipsoid of different aspect ratios at moderate Reynolds number

AIP Advances, 2022
Incompressible viscous flow past an ellipsoid of different aspect ratios (ARs, the ratio of the vertical to the horizontal axis of the ellipsoid, is ranged from 0.5 to 2) at a Reynolds number of 300 is investigated numerically by a finite volume method ...
Junwei Li, Benmou Zhou
doaj   +1 more source

Turbulent drag on a low-frequency vibrating grid in superfluid He-4 at very low temperatures [PDF]

, 2012
We present measurements of the dissipative turbulent drag on a vibrating grid in superfluid He-4 over a wide range of (low) frequencies. At high velocities, the dissipative drag is independent of frequency and is approximately the same as that measured ...
Bradley, D. I., Fisher, S. N., Guénault, A.M., Haley, R. P., Kumar, Mukesh, Lawson, C. R., McClintock, P. V. E., Munday, Lydia, Pickett, G. R., Poole, Malcolm, Schanen, Roch, Tsepelin, V., Williams, Paul   +12 more
core   +1 more source

Numerical studies influence configuration fairing flap track airfoil type naca 4412 and naca 6412 character unmanned aerial vehicle (UAV)

MATEC Web of Conferences, 2018
Wings have a function of changing the air flowing into force lift, and drag. It can reduce the drag is fairing flap track, where its function can reduce the obstacles caused by the effects of compressibility, fairing flap track also has a major influence
Pratama Handrico Ramelan, Bramantya Muhammad Agung   +1 more
doaj   +1 more source

A Novel Canopy Drag Coefficient Model for Analyzing Urban Wind Environments Based on the Large Eddy Simulation

Energies, 2021
It is very challenging to capture the drag effects for the computational fluid dynamics numerical simulations of the urban canopy wind environment.
Lian Shen, Yan Han, Guoji Xu, Chunsheng Cai, Ying Yang, Xugang Hua   +5 more
doaj   +1 more source