Results 1 to 10 of about 6,143,947 (388)

Active boundary layers in confined active nematics [PDF]

open access: yesNature Communications, 2022
The boundary of conventional liquid crystals is known to anchor the orientational field of the passive materials under equilibrium conditions. Here, the authors show an active nematic to develop active boundary layers that topologically polarize the ...
Jerôme Hardoüin   +5 more
doaj   +2 more sources

Vapour phase growth and grain boundary structure of molybdenum disulphide atomic layers [PDF]

open access: yesNature Materials, 2013
Single-layered molybdenum disulphide with a direct bandgap is a promising two-dimensional material that goes beyond graphene for the next generation of nanoelectronics. Here, we report the controlled vapour phase synthesis of molybdenum disulphide atomic
Sina Najmaei, Zheng Liu, Wu Zhou
exaly   +2 more sources

Stable Atmospheric Boundary Layers and Diurnal Cycles: Challenges for Weather and Climate Models [PDF]

open access: bronze, 2013
A. Holtslag   +11 more
semanticscholar   +2 more sources

Stable Boundary Layers and Subfilter-Scale Motions

open access: yesAtmosphere, 2023
Recent high-resolution large-eddy simulations (LES) of a stable atmospheric boundary layer (SBL) with mesh sizes N=(5123,10243,20483) or mesh spacings ▵=(0.78,0.39,0.2) m are analyzed.
James C. McWilliams   +3 more
doaj   +1 more source

Orthogonal series approximation for boundary layers [PDF]

open access: yesTheoretical and Applied Mechanics, 2004
In this paper we shall consider a class of singularly perturbed problems described by the ordinary differential equation of second order with small parameter multiplying the highest derivative and the appropriate boundary conditions, which describes ...
Adžić Nevenka, Ovcin Z.
doaj   +1 more source

Superfluid Boundary Layer [PDF]

open access: yesPhysical Review Letters, 2017
We model the superfluid flow of liquid helium over the rough surface of a wire (used to experimentally generate turbulence) profiled by atomic force microscopy. Numerical simulations of the Gross-Pitaevskii equation reveal that the sharpest features in the surface induce vortex nucleation both intrinsically (due to the raised local fluid velocity) and ...
Stagg GW, Parker NG, Barenghi CF
openaire   +4 more sources

On Long-Range Characteristic Length Scales of Shell Structures

open access: yesEng, 2023
Shell structures have a rich family of boundary layers including internal layers. Each layer has its own characteristic length scale, which depends on the thickness of the shell.
Harri Hakula
doaj   +1 more source

On the computation of planetary boundary-layer height using the bulk Richardson number method [PDF]

open access: yesGeoscientific Model Development, 2014
Experimental data from four field campaigns are used to explore the variability of the bulk Richardson number of the entire planetary boundary layer (PBL), Ribc, which is a key parameter for calculating the PBL height (PBLH) in numerical weather and ...
Y. Zhang   +6 more
doaj   +1 more source

Lubricating Ability of Protic Ionic Liquids as Additives to a Biodegradable Oil for Aluminum-Steel Contact: Effect of Alkyl Chain Length and Propensity to Hydrogen Bonding

open access: yesLubricants, 2023
Although aluminum alloys are widely used in the automotive and aerospace industries due to their excellent strength-to-weight ratio and good corrosion resistance, the poor tribological performance and low compatibility of these materials with lubricant ...
Hong Guo   +3 more
doaj   +1 more source

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