نتایج جستجو برای: micro couette

تعداد نتایج: 117048  

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2010
Daniel Borrero-Echeverry Michael F Schatz Randall Tagg

Recent studies have brought into question the view that at sufficiently high Reynolds number turbulence is an asymptotic state. We present direct observation of the decay of turbulent states in Taylor-Couette flow with lifetimes spanning five orders of magnitude. We also show that there is a regime where Taylor-Couette flow shares many of the decay characteristics observed in other shear flows,...

Journal: :The Astrophysical Journal 2021

We explore the effect of forcing on linear shear flow or plane Couette flow, which is also background in very small region Keplerian accretion disk. show that depending strength and boundary conditions suitable for systems under consideration, and, hence, disk velocity profile modifies to parabolic Poiseuille Couette-Poiseuille frame reference. In presence rotation, becomes unstable at a smalle...

1996
J. J. Dongarra

The Chebyshev tau method is examined in detail for a variety of eigenvalue problems arising in hydrodynamic stability studies, particularly those of Orr-Sommerfeld type. We concentrate on determining the whole of the top end of the spectrum in parameter ranges beyond those often explored. The method employing a Chebyshev representation of the fourth derivative operator, D 4, is compared with th...

Journal: :J. Comput. Physics 2014
Jorge A. Morales Matthieu Leroy Wouter J. T. Bos Kai Schneider

A volume penalization approach to simulate magnetohydrodynamic (MHD) flows in confined domains is presented. Here the incompressible visco-resistive MHD equations are solved using parallel pseudo-spectral solvers in Cartesian geometries. The volume penalization technique is an immersed boundary method which is characterized by a high flexibility for the geometry of the considered flow. In the p...

2008
Francisco Vega Reyes Andrés Santos

We discuss in this work the validity of the theoretical solution of the nonlinear Couette flow for a granular impurity obtained in a recent work [preprint arXiv:0802.0526], in the range of large inelasticity and shear rate. We show there is a good agreement between the theoretical solution and Monte Carlo simulation data, even under these extreme conditions. We also discuss an extended theoreti...

2005
DONALD COLES Donald Coles

Two distinct kinds of transition have been identified in Couette flow between concentric rotating cylinders. The first, which will be called transition by spectral evolution, is characteristic of the motion when the inner cylinder has a larger angular velocity than the outer one. As the speed increases, a succession of secondary modes is excited; the first is the Taylor motion (periodic in the ...

Journal: : 2023

Taylor-Couette flow between two concentric cylinders has received much attention due to its use in various applications, including biomedical devices, micro electro-mechanical systems, polymer pumping and electric motor cooling. Due the complex interaction of viscosity involved geometry within confined space, different regimes are dominant under conditions, affecting fluid dynamics heat transfe...

Journal: :Journal of Fluid Mechanics 1965

Journal: :Physical Review Letters 2012

Journal: :Journal of Fluid Mechanics 2018

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