Results 61 to 70 of about 301,862 (303)

Breaking the Surface: Buoyant Metal–Polymer Open–Cell Hybrid Lattice Metamaterials

Advanced Materials, EarlyView.
Open‐cell metal–polymer lattice metamaterials that defy sinking. (a) Injection process of the polyurethane (PU) foam into the titanium (Ti‐6Al‐4V) hollow‐strut lattice creating the open‐cell Ti‐6Al‐4V+PU hybrid lattice, (b) flotation test of a hybrid lattice specimen, and (c) a digital representation and experimental validation of a marine buoy ...
Jordan Noronha, Joey Tallon, Raad Omar, Jason Dash, Andrey Molotnikov, Martin Leary, Milan Brandt, Ma Qian   +7 more
wiley   +1 more source

Universal Features of Turbulent/Non-turbulent and Turbulent/Turbulent Interfaces

AbstractThe characteristics of turbulent/non-turbulent interfaces and turbulent/turbulent interfaces (TNTI and TTI) are analysed by new carefully designed direct numerical simulations (DNS). Whereas TNTIs separate the turbulent from the non-turbulent region in free shear flows and turbulent boundary layers, TTIs appear whenever two regions of distinct ...
Pedro D. Alves, Marco Zecchetto, Ricardo P. Xavier, Oliver Buxton, Carlos B. da Silva   +4 more
openaire   +1 more source

Upscaling Pulsed Laser Fragmentation in Liquids by Advanced Free‐Flow Setups

Advanced Materials Technologies, EarlyView.
Advanced flow setups providing thin colloid films are introduced to upscale pulsed laser fragmentation in liquids for sustainable nanoparticle synthesis. Their potential is demonstrated by yielding remarkably small ZnO nanoparticles of <7 nm. Numerical simulations complement the study, revealing that the superior performance can be attributed to ...
Jan Lino Kricke, Zongwen Fu, Sebastian Burgmann, Uwe Janoske, Carlos Doñate‐Buendía, Bilal Gökce   +5 more
wiley   +1 more source

Turbulence characterisation for Astronomical Observatories [PDF]

, 2012
Atmospheric turbulence has two effects in astronomy; (i) the broadening of the point spread function due to phase fluctuations limiting the resolution of imaging and (ii) producing intensity fluctuations known as scintillation.
SHEPHERD, HARRY,WILLIAM, Shepherd, Harry William   +1 more
core  

Comparisons of different implementations of turbulence modelling in lattice Boltzmann method

, 2015
In this paper, we present an alternative approach for the turbulence modelling in the single-relaxation-time lattice Boltzmann method (LBM) framework by treating the turbulence term as an extra forcing term, in addition to the traditional approach of ...
Chen, Shiyi, Shi, Yipeng, Chen, Yu, Wang, Moran, Xia, Zhenhua   +4 more
core   +1 more source

Reynolds Number Effects on Soliton-Like Coherent Structures in Free Jets

气体物理
To investigate the regulatory mechanism of Reynolds number on soliton-like coherent structures （SCS） in a circular free jet, a series of direct numerical simulations were conducted over a Re range of 2000 to 6600.
Ziyuan HU, Qingdong CAI, Yantao YANG
doaj   +1 more source

Surrogate‐Optimized Flow‐Guided Miniature Condenser for Rapid Exhaled Glucose Detection

Advanced Materials Technologies, EarlyView.
A surrogate‐optimized miniature condenser guides humid exhaled flow toward cold surfaces to accelerate exhaled breath condensate collection. By improving vapor access within a compact footprint, the design increases sample yield. This enables post‐collection enrichment and rapid colorimetric glucose detection from dilute exhaled biomarkers within a 5 ...
Yiming Thomas Lu, Yamin Mansur, Sai Peri, Jiangyuan Wan, Amio Pronoy Das Ritwik, Emily L. Johnson, Jingcheng Ma   +6 more
wiley   +1 more source

Mechanics of inhomogeneous turbulence and interfacial layers [PDF]

, 2006
The mechanics of inhomogeneous turbulence in and adjacent to interfacial layers bounding turbulent and non-turbulent regions are analysed. Different mechanisms are identified according to the straining by the turbulent eddies in relation to the strength ...
Hunt, J.C.R., Eames, I., Westerweel, J. (author), Westerweel, J., Eames, I. (author), Hunt, J.C.R. (author)   +5 more
core   +1 more source

On the Weissenberg effect of turbulence

Theoretical and Applied Mechanics Letters, 2019
Within the framework of the Navier–Stokes equations, the Weissenberg effect of turbulence is investigated. We begin with our investigation on the elastic effect of homogeneous turbulent shear flow.
Yu-Ning Huang, Wei-Dong Su, Cun-Biao Lee
doaj   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source