Results 11 to 20 of about 200,182 (303)

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

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

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 ...
H. Abdul-Rahman, H. Moria, Mohammad Rasidi Mohammad Rasani   +2 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

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

Drag Area, Frontal Area and Drag Coefficient in Cross-Country Skiing Techniques

Proceedings, 2018
The aim of this study was to investigate the air drag, frontal area and coefficient of drag of cross-country skiing classical and free style techniques. One highly skilled cross-country skier performed skiing-like classical and free style techniques on a
Mats Ainegren, Patrik Jonsson
doaj   +1 more source

Determination of Seebeck coefficient originating from phonon-drag effect using Si single crystals at different carrier densities

Scientific Reports, 2023
The phonon-drag effect is useful for improving the thermoelectric performance, especially the Seebeck coefficient. Therefore, the phonon and electron transport properties of Si single crystals at different carrier densities were investigated, and the ...
Masataka Hase, Daiki Tanisawa, Kaito Kohashi, Raichi Kamemura, Shugo Miyake, Masayuki Takashiri   +5 more
doaj   +1 more source

Drag Coefficient Parameterization under Hurricane Wind Conditions

Water, 2023
The influence of small-scale processes at the ocean–atmosphere boundary layer such as spray and foam on the surface waves prediction is studied. Estimates of the effect of including the exact number of specific fragmentation “parachute” type in the spray on the resulting drag coefficient is shown.
Alexandra Mikhailovna Kuznetsova, Georgy Alekseyevich Baydakov, Alexander Sergeyevich Dosaev, Yuliya Igorevna Troitskaya   +3 more
openaire   +1 more source

Significant Phonon Drag Enables High Power Factor in the AlGaN/GaN Two-Dimensional Electron Gas [PDF]

, 2019
In typical thermoelectric energy harvesters and sensors, the Seebeck effect is caused by diffusion of electrons or holes in a temperature gradient. However, the Seebeck effect can also have a phonon drag component, due to momentum exchange between charge
Boone, Derrick, Bruefach, Alexandra, Dowling, Karen M., Goldhaber-Gordon, David, Pop, Eric, Rojo, Miguel Muñoz, Satterthwaite, Peter F., Senesky, Debbie G., Yalamarthy, Ananth Saran   +8 more
core   +4 more sources