Results 261 to 270 of about 468,934 (298)

The Vertical Instability in a Positron Bunched Beam

Physical Review Letters, 1995
The results of experiments on the vertical instability observed in both positron and electron multibunch accumulations at the Photon Factory storage ring are presented. The betatron sidebands, which indicate a vertical instability, appear at different frequency regions depending on the polarities of the beam.
, Izawa, , Sato, , Toyomasu
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Rayleigh–Bénard instability in a vertical cylinder with a vertical magnetic field

Journal of Fluid Mechanics, 2002
This paper presents two linear stability analyses for an electrically conducting liquid contained in a vertical cylinder with a thermally insulated vertical wall and with isothermal top and bottom walls. There is a steady uniform vertical magnetic field.
Houchens, B. C., Witkowski, L. Martin, Walker, J. S.   +2 more
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Vertical Structure of Midlatitude Mesoscale Instabilities

Journal of Physical Oceanography, 1988
Abstract Instability processes in frontal jet regions outside the western boundary currents are examined for their ability to produce mesoscale variability comparable to that observed in the open ocean. The important of sufficient numerical resolution for a correct modeling of these processes is considered.
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Double-diffusive instability in a thin vertical channel

Physics of Fluids, 2021
Double-diffusive convection in the finger regime is studied using direct numerical simulations in a confined domain. For narrow (1–4 mm horizontal extent) domains, we demonstrate active instabilities that are uniquely double-diffusive, or in other words that no instabilities develop when differential diffusion is not present. The novel double-diffusive
Sierra Legare, Andrew Grace, Marek Stastna   +2 more
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SORET INSTABILITY IN A VERTICAL BRINKMAN POROUS ENCLOSURE

Numerical Heat Transfer, Part A: Applications, 2001
This paper presents an analytical and numerical study of the influence of the Soret effect on the onset of convection in a vertical porous layer subject to uniform heat fluxes along the vertical walls. In the formulation of the problem use is made of the Brinkman-extended Darcy model, which is relevant to sparsely packed porous media.
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Double-diffusive instabilities in a vertical slot

Journal of Fluid Mechanics, 1999
A fluid stably stratified by a salinity gradient and enclosed between two vertical boundaries can become unstable when it is subjected to a temperature difference between the walls. The linear stability of such a fluid in a vertical slot is investigated.
Kerr, Oliver S., Tang, Kit Yee
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ANALYSIS OF VERTICAL INSTABILITY IN THE JET EXPERIMENT

1989
This paper describes the electromagnetic analysis of vertical instability tests performed in JET. These and related mechanical studies are aimed at establishing safe operating limits.
R. ALBANESE, E. BERTOLINI, S. BOBBIO, MARTONE, Raffaele, G. MIANO, P. NOLL   +5 more
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Vertical Instability in Non-Circular Deformable Plasmas

1995
The effect of plasma deformability on vertical instability growth rate has been studied. The model describes an elongated, triangular plasma by a set of circuits that reproduces the same flux surfaces of a given plasma equilibrium. It is shown that in IGNITOR the vertical instability growth rate is higher for deformable than for rigid plasma and that ...
C. Rita, M. Roccella, M. Nassi, S. Graziadei   +3 more
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Double-diffusive convection instability in a vertical porous enclosure

Journal of Fluid Mechanics, 1998
The Galerkin and the finite element methods are used to study the onset of the double-diffusive convective regime in a rectangular porous cavity. The two vertical walls of the cavity are subject to constant fluxes of heat and solute while the two horizontal ones are impermeable and adiabatic.
Mamou, M., Vasseur, P., Bilgen, E.
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Convective instabilities in vertical fractures and faults

Journal of Geophysical Research: Solid Earth, 1979
Natural convection of water contained in a vertical fracture or fault in which the temperature increases with depth is strongly influenced by the heat transport processes not only within the water itself but also by the heat transferred to and from the surrounding rock mass. The results of a linear stability analysis indicate that the critical Rayleigh
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