Results 81 to 90 of about 716,438 (286)

Experiments on a Flettner rotor at critical and supercritical Reynolds numbers

Journal of Wind Engineering and Industrial Aerodynamics, 2019
Abstract The Flettner rotor is attracting increasing attention as a viable technology for wind-assisted ship propulsion. Nonetheless, the influence of the Reynolds number on the aerodynamic performance of rotating cylinders is still unclear and under debate.
Bordogna, G., Muggiasca, S., Giappino, S., Belloli, M., Keuning, J. A., Huijsmans, R. H. M., van ‘t Veer, A. P.   +6 more
openaire   +3 more sources

Effects of Outsourced Agricultural Extension Services on the Technical Efficiency and Financial Returns of Soybean Farms in Northern Cameroon

Agribusiness, EarlyView.
ABSTRACT In the agricultural landscape of most developing countries, the last decade has witnessed the expansion of outsourced agricultural extension services. Private firms and nongovernmental organizations focused on delivering agricultural extension and advisory services to farmers have emerged.
Boris D. Soh Wenda, Doria A. Medondjeu, Dorothy E. Fon, Stefan Sieber   +3 more
wiley   +1 more source

Multidisciplinary Treatment for Esophagogastric Junction Cancer From a Dutch Perspective

Annals of Gastroenterological Surgery, EarlyView.
ABSTRACT Esophagogastric junction (EGJ) cancer is an increasing health burden worldwide. Over the past decade, significant advancements in centralization, multimodal treatment strategies, as well as the widespread adoption of minimally invasive surgical techniques, have led to marked improvements in perioperative outcomes and overall survival of EGJ ...
Hidde C. G. Overtoom, Suzanne S. Gisbertz   +1 more
wiley   +1 more source

Optimum Shape of Critical Nozzles on Low Reynolds Numbers

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 2011
For toroidal throat Venturi nozzles with various diffuser lengths and half angles, the behaviors of their critical back pressure ratios were experimentally investigated on the Reynolds number less than 2×104 . The results showed that the diffuser shapes provided in JIS Z 8767(2006) are not always adequate for flow measurements under the above Reynolds ...
ASANO, Hiroshi, NAKAO, Shin-ichi, YAKUWA, Takeshi   +2 more
openaire   +2 more sources

CFD modeling and sensitivity‐guided design of silicon filament CVD reactors

AIChE Journal, EarlyView.
Abstract Filament‐based chemical vapor deposition (CVD) for silicon (Si) coatings is often treated as an adaptation of planar deposition. But this overlooks fundamental shifts in transport phenomena and reaction kinetics. In filament CVD, the filament acts as a substrate, heat source, and flow disruptor simultaneously. In this work, we ask: What really
G. P. Gakis, G. Loachamín‐Suntaxi, I. G. Aviziotis, E. D. Koronaki, P. P. Filippatos, G. Chatzigiannakis, S. P. A. Bordas, D. Davazoglou, A. G. Boudouvis   +8 more
wiley   +1 more source

Steady Flow of Purely Viscous Shear-Thinning Fluids in a 1:3 Planar Gradual Expansion

Journal of Applied Fluid Mechanics, 2019
Laminar flow of non-Newtonian fluid (shear-thinning) through a 1:3 planar gradual expansion is numerically investigated, for various Power-Law index (0.6, 0.8 and 1.0) and expansion angles (15, 30, 45, 60 and 90°) at different generalized Reynolds number
A. Menouer, N. Sad Chemloul, K. Chaib, A. Kadari   +3 more
doaj  

The Aerodynamics of New Design Soccer Balls Using a Three-Dimensional Printer

Applied Sciences
Eight balls were manufactured with a 3D printer to resemble various types of 32-panel soccer balls. One ball was completely smooth, whereas the other seven possessed various dimple patterns on their surface panels.
Sungchan Hong, John Eric Goff, Takeshi Asai   +2 more
doaj   +1 more source

Solid particles focusing, orienting, and de‐focusing in planar Poiseuille flow

AIChE Journal, EarlyView.
Abstract Three‐dimensional, time‐dependent lattice‐Boltzmann simulations of neutrally buoyant particles in planar Poiseuille flow have been performed. The particles are spherical or cylindrical (the latter with a length over diameter ratios in the range 1/3 to 2) and have volume fraction ranging from virtually zero (one particle) to 0.15. The channel's
J. J. Derksen
wiley   +1 more source

SimulationofFlowFieldina FloatingRingSealandModificationofItsLeakageRateExpression

工程科学与技术, 2016
:ByusingGAMBITsoftware,thecomputationaldomainofthethrottleclearancewasmeshedinthemixedgridunittypeofhexahedronandwedge.Basedonlaminarflowmodel,threedimensionalnumericalsimulationoftheworkingstateoffloatingring’s ...
陈志, 高春阳, 范唯超, 吉华
doaj  

Design method of a vertical screw conveyor based on Taylor–Couette–Poiseuille stable helical vortex

Advances in Mechanical Engineering, 2017
This article investigates gas–solid two-phase flow in a vertical screw conveyor and analyzes the distribution function of the circumferential velocity of particles in the radial direction.
Sun Xiaoxia, Meng Wenjun, Yuan yuan
doaj   +1 more source