نتایج جستجو برای: coriolis force

تعداد نتایج: 189181  

Journal: :Applied sciences 2021

Annulus pipe conveying fluids have many practical applications, such as hydraulic control lines and aircraft fuel lines. In some these tubes are exposed to high speeds. Normally, this leads a vibration effect which may be of catastrophic nature. The phenomenon is not only driven by the centrifugal forces, but an important role played also Coriolis forces. Many theoretical approaches exist for s...

2015
Kyle A. Baldwin Matthew M. Scase Richard J. A. Hill

It is well-established that the Coriolis force that acts on fluid in a rotating system can act to stabilise otherwise unstable flows. Chandrasekhar considered theoretically the effect of the Coriolis force on the Rayleigh-Taylor instability, which occurs at the interface between a dense fluid lying on top of a lighter fluid under gravity, concluding that rotation alone could not stabilise this ...

2015
Cheng Qi Chiu-On Ng

An analytical model is presented for electro-osmotic flow through a wide rectangular microchannel rotating about an axis perpendicular to its own. The flow is driven by a steady electric field applied along the channel axis, where the upper and lower walls are charged with uniform but possibly disparate zeta potentials. The aim is to understand the interaction between Coriolis force, pressure g...

2014
Claudia Zimmermann Rodion Groll

In this paper the influence of an impressed Coriolis force field on the configuration of a turbulent Rayleigh-Bénard convection problem is investigated in an experimental and numerical study. The main purpose of both studies lie on the analysis of a possible stabilising effect of a Coriolis acceleration on the turbulent unsteady structures inside the fluid. The relative Coriolis acceleration wh...

2016
TAREK M. ELGINDI KLAUS WIDMAYER

We prove stability for arbitrarily long times of the zero solution for the so-called β-plane equation, which describes the motion of a two-dimensional inviscid, ideal fluid under the influence of the Coriolis effect. The Coriolis force introduces a linear dispersive operator into the 2d incompressible Euler equations, thus making this problem amenable to an analysis from the point of view of no...

2008
Thierry Gallay

The Navier-Stokes-Coriolis system is a simple model for rotating fluids, which allows to study the influence of the Coriolis force on the dynamics of three-dimensional flows. In this paper, we consider the NSC system in an infinite three-dimensional layer delimited by two horizontal planes, with periodic boundary conditions in the vertical direction. If the angular velocity parameter is suffici...

2012
WENCHANG YANG RICHARD SEAGER MARK A. CANE

In this paper, zonal momentum balances of the tropical atmospheric circulation during the global monsoon mature months (January and July) are analyzed in three dimensions based on the ECMWF Interim ReAnalysis (ERA-Interim). It is found that the dominant terms in the balance of the atmospheric boundary layer (ABL) in both months are the pressure gradient force, the Coriolis force, and friction. ...

2000
Jeremy S. Heyl

The increase in spin frequency as the burning atmospheres of Type I X-ray bursts cool provides a strong constraint on the radius of the underlying neutron star. If the change in spin frequency is due to a change in the thickness of the atmosphere, the radius of the star must exceed 3GM/c for any equation of state and approximately 3.5GM/c for most physically reasonable equations of state. This ...

1999
Jongsoo Kim Dongsu Ryu

We investigate the nonlinear effects of uniform rotation on the Parker instability in an exponentially-stratified disk through high-resolution simulations. During the linear stage, the speed of gas motion is subsonic and the evolution with the rotation is not much different from that without the rotation. This is because the Coriolis force is small. During the nonlinear stage, oppositely-direct...

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