نتایج جستجو برای: rapid mixing

تعداد نتایج: 365824  

1998
M. Cencini G. Lacorata A. Vulpiani

In this paper we investigate mixing and transport in correspondence of a meandering jet. The large-scale flow field is a kinematically assigned streamfunction. Two basic mixing mechanisms are considered, first separately and then combined together: deterministic chaotic advection, induced by a time dependence of the flow, and turbulent diffusion, described by means of a stochastic model for par...

احمدی خلجی, احمد, خلیلی, محمود, سرجوقیان, فاطمه, طهماسبی, زهرا ,

Astaneh granodiorite intrusion, located at south west of Arak, includes an abundant rounded and rarely ellipsoid microgranular enclaves composed of gabbro, diorite and quartz diorite. The diameter of enclaves ranges from a few millimeters to 40 centimeters. These enclaves are very fine-grained and show chilled margins. The size of crystals decreases gardually from center toword margin. The chil...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2007
Jia Ou Geoffrey R Moss Jonathan P Rothstein

Under laminar, microscale flow conditions, rapid mixing can be difficult to achieve. In these low Reynolds number flows, mixing rates are governed by molecular diffusion, and in the absence of enhanced mixing techniques, mixing lengths and residence times can be much longer than most applications will allow. A number of active mixing techniques have been developed to improve mixing; however, th...

Journal: :J. Discrete Algorithms 2007
Magnus Bordewich Martin E. Dyer

Path coupling is a useful technique for simplifying the analysis of a coupling of a Markov chain. Rather than defining and analysing the coupling on every pair in Ω ×Ω , where Ω is the state space of the Markov chain, analysis is done on a smaller set S ⊆Ω ×Ω . If the coefficient of contraction β is strictly less than one, no further analysis is needed in order to show rapid mixing. However, if...

2014
Ryan P. Murphy Elizabeth G. Kelley Simon A. Rogers Millicent O. Sullivan Thomas H. Epps

Chain exchange between block polymer micelles in highly selective solvents, such as water, is well-known to be arrested under quiescent conditions, yet this work demonstrates that simple agitation methods can induce rapid chain exchange in these solvents. Aqueous solutions containing either pure poly(butadiene-b-ethylene oxide) or pure poly(butadiene-b-ethylene oxide-d4) micelles were combined ...

Journal: :CoRR 2017
Shana Moothedath Prasanna Chaporkar Madhu N. Belur

This paper deals with a complete bipartite matching problem with the objective of finding an optimal matching that maximizes a certain generic predefined utility function on the set of all matchings. After proving the NP-hardness of the problem using reduction from the 3-SAT problem, we propose a randomized algorithm based on Markov Chain Monte Carlo (MCMC) technique for solving this. We sample...

1960
GLENN W. BRIER

A brief description is given of a new refrigerated expansion charnbcr apparatus based on an Australian C.S.I.R.O. design for measuring ice nuclei concentrations. The compatibility of results between five instruments of similar construction, a comparison of data obtained with a simple version of the mixing chamber method, and homogeneity of rapid expansion measurernents at sites 8 and 100 miles ...

2015
Simin Sun Xinqian Leng Hubert Chanson

In water supply channels, the brusque operation of control gates may induce large unsteady flow motion called surges. Such a rapid operation of gates must often be restricted, although it may be conducted to scour silted channels and sewers. Herein a physical study was conducted under controlled flow conditions to study the turbulent mixing in the very-close vicinity of a rapidly opening/closin...

Journal: :Electrophoresis 2011
Alireza Salmanzadeh Hadi Shafiee Rafael V Davalos Mark A Stremler

The first experimental evidence of mixing enhancement in a microfluidic system using contactless dielectrophoresis (cDEP) is presented in this work. Pressure-driven flow of deionized water containing 0.5 μm beads was mixed in various chamber geometries by imposing a dielectrophoresis (DEP) force on the beads. In cDEP the electrodes are not in direct contact with the fluid sample but are instead...

2009
Lijun Liu Peter Olson

[1] Convective mixing in the fluid outer core can induce rapid transient decrease of the geomagnetic dipole. Here we determine rates of dipole moment decrease as a function of magnetic Reynolds number following convective instability in a numerical dynamo and in axisymmetric kinematic flows. Our calculations show that mixing flows induce reversed magnetic flux on the core-mantle boundary throug...

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