نتایج جستجو برای: velocity distributions

تعداد نتایج: 271174  

2014
Martin David Wells

A complete and accurate description of the conduction properties of the entire population of nerve fibers within a peripheral nerve bundle has long been an important objective of clinical neuromuscular electrophysiology. Access to such information would increase the sensitivity and specificity of neuromuscular electrodiagnostics, and provide improved means of assessing nerve development, growth...

In this article, the vibrational behavior of a spinning cylindrical thick shell carrying spring- mass systems and conveying viscos fluid flow under various temperature distributions is investigated. This structure rotates about axial direction and the formulations include the coriolis and centrifugal effects. In addition, this system is conveying viscous fluid, and the related force is calculat...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی 1392

flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...

Mozhgan Movahedi Parizi Rahbar Rahimi

Sieve trays are widely used in the gas- liquid contactors such as distillation and absorption towers. In this article, a three-dimensional, two phase CFD model using Euler-Euler framework was developed to simulate a distillation tower with two sieve trays. Hydrodynamic simulation of air and water system in different rates of gas phase was carried out and velocity distribution parameters, clear ...

Journal: :Physical review letters 2004
J S van Zon F C MacKintosh

Motivated by recent experiments reporting non-Gaussian velocity distributions in driven dilute granular materials, we study by numerical simulation the properties of 2D inelastic gases. We find theoretically that the form of the observed velocity distribution is governed primarily by the coefficient of restitution eta and q=N(H)/N(C), the ratio between the average number of heatings and the ave...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2005
E Ben-Naim B Machta J Machta

The kinetic theory of granular gases is studied for spatially homogeneous systems. At large velocities, the equation governing the velocity distribution becomes linear, and it admits stationary solutions with a power-law tail, f (v) approximately v(-sigma) . This behavior holds in arbitrary dimension for arbitrary collision rates including both hard spheres and Maxwell molecules. Numerical simu...

1997
E. Ben-Naim P. L. Krapivsky

the steady state characteristics of the flow from a Boltzmann-like equation. A single dimensionless parameter, R = c0v0t0 with c0 the concentration, v0 the velocity range, and t −1 0 the passing rate, determines the nature of the steady state. When R 1, uninterrupted flow with single cars occurs. When R 1, large clusters with average mass 〈m〉 ∼ R form, and the flux is J ∼ R−γ . The initial dist...

2010
Ingo Bojak David T. J. Liley

By modelling the average activity of large neuronal populations, continuum mean field models (MFMs) have become an increasingly important theoretical tool for understanding the emergent activity of cortical tissue. In order to be computationally tractable, long-range propagation of activity in MFMs is often approximated with partial differential equations (PDEs). However, PDE approximations in ...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2005
J S van Zon F C MacKintosh

We investigate the idea that velocity distributions in granular gases are determined mainly by eta, the coefficient of restitution and q, which measures the relative importance of heating (or energy input) to collisions. To this end, we study by numerical simulation the properties of inelastic gases as functions of eta, concentration phi, and particle number N with various heating mechanisms. F...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2013
Andrea Fiege Benjamin Vollmayr-Lee Annette Zippelius

Large-scale simulations and analytical theory have been combined to obtain the nonequilibrium velocity distribution, f(v), of randomly accelerated particles in suspension. The simulations are based on an event-driven algorithm, generalized to include friction. They reveal strongly anomalous but largely universal distributions, which are independent of volume fraction and collision processes, wh...

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