Results 151 to 160 of about 4,765,914 (397)

Turbulent Drag Reduction of polyelectrolyte (DNA) solutions: relation with the elongational viscosity [PDF]

, 2001
Christian Wagner, Yassine Amarouchene, Patrick S. Doyle, Daniel Bonn   +3 more
openalex   +1 more source

From Brittle to Flexible: Influence of Glucose‐Based Additives on Cellulose Nanocrystal Self‐Assembly in Suspension and Dried Photonic Films

Advanced Optical Materials, EarlyView.
Cellulose nanocrystals (CNCs) self‐assemble in aqueous suspension into chiral nematic liquid crystals, resulting in structurally colored films upon drying. Here, the influence of sugar additives on CNC self‐assembly in suspension and in films are studied.
Buse Tatli, Alexandra R. Rousseau, Wenkui Xing, Matteo Hirsch, Emily D. Cranston, Tiffany Abitbol   +5 more
wiley   +1 more source

Experimental Investigation on Drag Reduction Characteristics of Riblets Considering the Flow Environment of Fuselage

Aerospace
The riblets surface is a passive turbulence drag reduction technology that holds promising application prospects in drag reduction for large aircraft. Currently, most research on the drag reduction characteristics of riblets is limited to medium and low ...
Qiyue Ma, Peiqing Liu, Hao Guo, Fei Cui, Yankun Su, Chunpeng Li, Tiejun Zhang   +6 more
doaj   +1 more source

An Experimental Investigation of Helicopter Rotor Hub Fairing Drag Characteristics [PDF]

A study was done in the NASA 14- by 22-Foot Wind Tunnel at Langley Research Center on the parasite drag of different helicopter rotor hub fairings and pylons. Parametric studies of hub-fairing camber and diameter were conducted. The effect of hub fairing/
Lance, M. B., Stroub, R. H., Sung, D. Y., Young, L. A.   +3 more
core   +1 more source

Changes in turbulent dissipation in a channel flow with oscillating walls

, 2012
Harmonic oscillations of the walls of a turbulent plane channel flow are studied by direct numerical simulations to improve our understanding of the physical mechanism for skin-friction drag reduction. The simulations are carried out at constant pressure
Batchelor, Claudio Ottonelli, Davidson, Garabedian, Hinze, Maurizio Quadrio, Pierre Ricco, Tennekes, Yosuke Hasegawa   +8 more
core   +1 more source

Inverse‐Designed on‐Chip Terahertz Three‐Channel Mode and Wavelength Division Demultiplexer

Advanced Photonics Research, EarlyView.
An ultracompact terahertz demultiplexer is developed using a hybrid inverse design that combines genetic algorithms with topology optimization. The device enables simultaneous mode‐ and wavelength‐division multiplexing within a footprint smaller than two wavelengths.
Faqian Chong, Yulun Wu, Bingtao Gao, Shilong Li, Hongsheng Chen, Song Han   +5 more
wiley   +1 more source

Global effect of local skin friction drag reduction in spatially developing turbulent boundary layer

, 2016
A numerical investigation of two locally applied drag reducing control schemes is carried out in the configuration of a spatially developing turbulent boundary layer (TBL).
Frohnapfel, B., Hasegawa, Y., Schlatter, P., Stroh, A.   +3 more
core   +1 more source

On–Off Switchable Micromotors for Use in Steerable Microvehicles

Advanced Robotics Research, EarlyView.
Electrically controllable micromotors and microvehicles are developed by tuning the diffusion of the fuel. Self‐propelled micromotors using bubble propulsion show great promise for miniaturized devices with multiuse purposes such as cargo delivery and sensing. However, there is currently no method to electrically switch the micromotors on or off. Here,
Hugo Severinsson, Eswaran Murugasen, Jose G. Martinez, Edwin W. H. Jager   +3 more
wiley   +1 more source

Drag reduction and heat transfer characteristics of graphene oxide nanosheet suspensions

, 2020
Satoshi Ogata, Yuta Nishina, Hiroshi Tochigi, Keizo WATANABE   +3 more
openalex   +2 more sources

Modulus‐Switchable Miniature Robots for Biomedical Applications: A Review

Advanced Robotics Research, EarlyView.
Materials, robot designs, proof‐of‐concept functions, and biomedical applications of modulus‐switchable miniature robots. Miniature soft robots have shown great potential in biomedical applications due to their excellent controllability and suitable mechanical properties in biological environments.
Chunyun Wei, Yibin Wang, Jiangfan Yu
wiley   +1 more source