Results 231 to 240 of about 21,769 (265)

Momentum implications for buoyant diffusion flames

Combustion and Flame, 1983
Abstract Using assumed Gaussian forms for the transverse variation of mean quantities and well-established centerline variations, the integrated form of the momentum equation is solved for the vertical variation of the radial extent of buoyant diffusion flames. Closure is obtained by assuming that the convective heat flux at the flame tip is equal to
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On the diffusion of momentum and mass by internal gravity waves

Journal of Fluid Mechanics, 1976
The interaction between short internal gravity waves and a larger-scale mean flow in the ocean is analysed in the Wkbj approximation. The wave field determines the radiation-stress term in the momentum equation of the mean flow and a similar term in the buoyancy equation. The mean flow affects the propagation characteristics of the wave field.
Müller, Peter, Olbers, Dirk Jürgen
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Diffusion and dissipation by linear momentum in spherical environment

International Journal of Modern Physics B, 2014
An open quantum system is studied consisting of a particle moving in a spherical space with an infinite wall. With the theory of Lindblad the system is described by a density matrix which gets affected by operators with diffusive and dissipative properties depending on the linear momentum and density matrix only. It is shown that an infinite number of
Scheid, Werner, Isar, Aurelian, Sandulescu, Aurel   +2 more
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Angular momentum diffusion and the initiation of cyclones

Nature, 1976
IT is possible to explain1,2 the intensification of a cyclone vortex once the stream lines in a weak depression close around a core of higher vorticity, but it is less clear how the process starts. Scorer3 proposed that convection might diffuse angular momentum within a field of initially uniform rotation to localised regions, thereby concentrating ...
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Explaining momentum profits with an epidemic diffusion model

Journal of Economics and Finance, 2006
We show that information diffusion is a function of its dissemination and assimilation. Whereas dissemniation is a function of observable factors such as volume and price volatility, assimilation is dependent on unobservable factors such as the usefulness and reliability of information. We find that buying low volume (or low volatility) past losers and
Balsara, Nauzer, Zheng, Lin, Vidozzi, Luca, Vidozzi, Andrea   +3 more
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Anomalous diffusion of momentum in a dilute gas–solid suspension

Physics of Fluids A: Fluid Dynamics, 1992
The velocity variations in a monodisperse suspension of solid particles settling in a gas are studied in the limit 1≪St≪φ−3/4, where φ is the volume fraction, St=mU/(6πμfa2) is the Stokes number, m is the mass of particles, a is their radius, U is their terminal velocity, and μf is the viscosity of the suspending gas.
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Momentum diffusion of atoms moving in laser fields

Journal of Physics B: Atomic, Molecular and Optical Physics, 1992
The momentum diffusion coefficient, as a function of position and velocity, is discussed for two-state atoms travelling through a standing-wave laser field. Equations leading to the force and diffusion coefficient have been obtained by Minogin. The authors present an alternative derivation, based on moments of the Wigner function and give numerical ...
K Berg-Sorenson, Y Castin, E Bonderup, K Molmer   +3 more
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Ratio of Momentum Diffusivity to Thermal Diffusivity

2022
Isaac Lare Animasaun, Nehad Ali Shah, Abderrahim Wakif, Basavarajappa Mahanthesh, Ramachandran Sivaraj, Olubode Kolade Koriko   +5 more
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Anomalous momentum diffusion in the classical kicked rotor

Chaos, Solitons & Fractals, 2006
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zheng, Yindong, Kobe, Donald H.
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The influence of momentum diffusion on laser cooling of atoms

Zeitschrift für Physik D Atoms, Molecules and Clusters, 1994
We show that laser cooling by coherent population trapping in case of zero radiation force — when atomic evolution is due to only momentum diffusion — can be effectively described by use of the Fokker-Planck equation for the atomic distribution function. Our quasiclassical approach allows numerically and analytically to investigate the dynamics and the
E. Korsunsky, A. Snegiriov, V. Gordienko, B. Matisov, L. Windholz   +4 more
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