نتایج جستجو برای: confined fluids

تعداد نتایج: 83858  

Journal: :HNPS Advances in Nuclear Physics 2022

In the current study we briefly review advantages of utilising elastic neutron scattering techniques to reveal structure porous materials and pore-confined fluids. Furthermore, highlight benefits in situ CO2 injection model systems as well sedimentary rocks explore pore morphology, accessibility structural properties CO2. This information is important for design optimal sequestration gas oil re...

Journal: :Nano letters 2013
Steven F Buchsbaum Nick Mitchell Hugh Martin Matt Wiggin Andre Marziali Peter V Coveney Zuzanna Siwy Stefan Howorka

The voltage-driven passage of biological polymers through nanoscale pores is an analytically, technologically, and biologically relevant process. Despite various studies on homopolymer translocation there are still several open questions on the fundamental aspects of pore transport. One of the most important unresolved issues revolves around the passage of biopolymers which vary in charge and v...

2016
WILLIAM C. TROY EDWARD A. OVERMAN J. P. KEENER

In [4], Rajagopal et al. use a perturbation analysis suggested by Beard and Walters [1] for boundary layer flows of non-Newtonian fluids. They consider a wall coinciding with the plane y = 0 and with the flow confined to y > 0. Two equal and opposite forces are applied along the jc-axis so that the wall is stretched while the origin remains fixed. The steady two-dimensional boundary layer model...

Journal: :Physical review letters 2008
Patricia Burriel Josep Claret Jordi Ignés-Mullol Francesc Sagués

An anomalously long transient is needed to achieve a steady pressurization of a fluid when forced to flow through micronarrowed channels under constant mechanical driving. This phenomenon, known as the "bottleneck effect" is here revisited from a different perspective, by using confined displacements of interfacial fluids. Compared to standard microfluidics, such effect admits in this case a ne...

2000
S. M. Gatica M. W. Cole

We explore the equations of state and other properties of various quantum fluids (He, He, their mixtures, and H2) confined within individual carbon nanotubes. Above a threshold number of particles, Na, the fluid density near the axis begins to grow above a negligibly small value. The properties of this axial fluid phase are sensitive to the tube size and hence to the transverse compression in t...

2017
Philippe Peyla Claude Verdier P. Peyla C. Verdier

We present rheological experiments of confined suspensions at moderate concentrations. The analysis is carried out in the framework of a previous study on particle suspensions [Davit and Peyla, EPL, 83, 64001 (2008)] where simulations revealed the presence of unusual effects attributed to confinement, i.e. when the gap size (h) becomes closer to the particle size (d). Deviations from the usual ...

Journal: :Chemical communications 2008
Jiangying Qu Zongbin Zhao Jieshan Qiu Yury Gogotsi

Well-defined carbon polyhedrons with faceted morphologies and hollow internal structures made of self-organized multi-walled carbon nanotubes have been fabricated by gas phase catalytic CVD inside microchannels, of which the confined space is critical for the formation of polyhedral structures with hexagonal, heptagonal and octagonal cross-sections that show superhydrophobic properties, with th...

Journal: :The Journal of chemical physics 2006
C Micheletti D Marenduzzo E Orlandini D W Sumners

Stochastic simulations are used to characterize the knotting distributions of random ring polymers confined in spheres of various radii. The approach is based on the use of multiple Markov chains and reweighting techniques, combined with effective strategies for simplifying the geometrical complexity of ring conformations without altering their knot type. By these means we extend previous studi...

2011
David Sarriá Erik Molino Antoni Mànuel Albert García Guiomar Rotllant Enric Gisbert Francesc Sardà Jacopo Aguzzi Valerio Sbragaglia

The purpose of this work is to study and evaluate the limitations of using acoustic communications in the vicinity of artificial reefs. By placing hydrophones and transmitters in different strategic locations we have studied the performance of this technology in confined spaces. The ultimate goal of this work is to provide information for the proper design of acoustic communication systems to m...

Journal: :Physical chemistry chemical physics : PCCP 2014
Nicole M Smith K Swaminathan Iyer Ben Corry

Chemical reactions inside carbon nanotubes can yield unusual outcomes. Molecular dynamics simulations show that within the confined space of carbon nanotubes, the 1,4-exo adduct of a Diels-Alder cycloaddition may be produced instead of the 9,10-adduct, which is favoured in bulk. The likely product is highly dependent on the nanotube radius and reactant size.

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