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Results 11 - 20
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547
Lecture 6: The Batchelor spectrum and tracer cascade
"... In this lecture we consider the problem of determining the spectrum of a passive tracer advected by a velocity eld. The evolution of the tracer is described by the equation ..."
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In this lecture we consider the problem of determining the spectrum of a passive tracer advected by a velocity eld. The evolution of the tracer is described by the equation
Lagrangian dynamics for a passive tracer in a class of Gaussian Markovian ows
, 2001
"... We formulate a stochastic di erential equation describing the Lagrangian environment process of a passive tracer in Ornstein–Uhlenbeck velocity elds. We subsequently prove a local existence and uniqueness result when the velocity eld is regular. When the Ornstein–Uhlenbeck velocity eld is only spati ..."
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We formulate a stochastic di erential equation describing the Lagrangian environment process of a passive tracer in Ornstein–Uhlenbeck velocity elds. We subsequently prove a local existence and uniqueness result when the velocity eld is regular. When the Ornstein–Uhlenbeck velocity eld is only
Astronomy Astrophysics Magnetic elds in barred galaxies II. Dynamo models
, 2001
"... Abstract. We study the generation and maintenance of large-scale magnetic elds in barred galaxies. We take a velocity eld (with strong noncircular components) from a published gas dynamical simulation of Athanassoula (1992), and use this as input to a galactic dynamo calculation. Our work is largely ..."
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Abstract. We study the generation and maintenance of large-scale magnetic elds in barred galaxies. We take a velocity eld (with strong noncircular components) from a published gas dynamical simulation of Athanassoula (1992), and use this as input to a galactic dynamo calculation. Our work
Conservative, Shock-Capturing Transport Methods With Nonconservative Velocity Approximations
- Comput. Geosci
, 1999
"... . Conservative high-resolution, or shock-capturing, methods have become widely used for modeling transport equations described by conservation laws. In many geoscience applications, the transport equation is coupled to a conservation or continuity equation for a velocity eld. Depending on how the ve ..."
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Cited by 5 (1 self)
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. Conservative high-resolution, or shock-capturing, methods have become widely used for modeling transport equations described by conservation laws. In many geoscience applications, the transport equation is coupled to a conservation or continuity equation for a velocity eld. Depending on how
Measurements of magnetic elds on T Tauri stars
"... Abstract. Stellar magnetic elds including a strong dipole component are believed to play a critical role in the early evolution of newly formed stars and their circumstellar accretion disks. It is currently believed that the stellar magnetic eld truncates the accretion disk several stellar radii abo ..."
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above the star. This action forces accreting material to
ow along the eld lines and accrete onto the star preferentially at high stellar latitudes. It is also thought that the stellar rotation rate becomes locked to the Keplerian velocity near the radius where the disk is truncated. This paper reviews
Two di!erent rapid decorrelation in time limits for turbulent di!usion
, 1998
"... A turbulent diusion model in which the velocity eld is Gaus-sian and rapidly decorrelating in time (GRDT) has been widely used recently in an endeavor to understand the emergence of anomalous scaling behavior of physical elds in fluid mechanics from the un-derlying stochastic partial dierential equa ..."
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Cited by 1 (1 self)
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A turbulent diusion model in which the velocity eld is Gaus-sian and rapidly decorrelating in time (GRDT) has been widely used recently in an endeavor to understand the emergence of anomalous scaling behavior of physical elds in fluid mechanics from the un-derlying stochastic partial dierential
RevMexAA (Serie de Conferencias), 10, 134-137 (2001)
"... The isolated interacting galaxy pair NGC 5426/27 (Arp 271) was observed using the scanning Fabry{Perot interferometer PUMA. The velocity eld, various kinematical parameters and rotation curve for each galaxy were derived. We found a small bar{like structure in NGC 5426 and a severely distorted velo ..."
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The isolated interacting galaxy pair NGC 5426/27 (Arp 271) was observed using the scanning Fabry{Perot interferometer PUMA. The velocity eld, various kinematical parameters and rotation curve for each galaxy were derived. We found a small bar{like structure in NGC 5426 and a severely distorted
ON A LINEARIZED OPERATOR OF THE EQUATION FOR ASYMMETRIC BURGERS VORTICES
"... We consider a stationary
ow of a viscous incompressible
uid whose velocity eld U takes the form (1.1) U(x1; x2; x3) = u(x1; x2; x3) + u(x1; x2): Here the velocity eld u expresses an asymmetric background straining
ow and is ..."
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We consider a stationary
ow of a viscous incompressible
uid whose velocity eld U takes the form (1.1) U(x1; x2; x3) = u(x1; x2; x3) + u(x1; x2): Here the velocity eld u expresses an asymmetric background straining
ow and is
Boundary Element Method for Internal Axisymmetric Flow
, 1998
"... We present an accurate fast method for the computation of potential internal ax-isymmetric °ow based on the boundary element technique. We prove that the com-puted velocity ¯eld asymptotically satis¯es reasonable boundary conditions at in¯nity for various types of inlet/exit. Computation of internal ..."
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We present an accurate fast method for the computation of potential internal ax-isymmetric °ow based on the boundary element technique. We prove that the com-puted velocity ¯eld asymptotically satis¯es reasonable boundary conditions at in¯nity for various types of inlet/exit. Computation
An Investigation of the Inuence of Nozzle Aspect Ratio on the Velocity Field of Turbulent Plane Jet
, 2004
"... The effect of nozzle aspect ratio (wH) (major axis to minor axis ratio) on the velocity eld of a turbulent plane jet is inves-tigated using a hot-wire anemometer. The aspect ratios investi-gated were in the range 10 w H 60. The initial turbulence intensity proles exhibit a lower intensity at highe ..."
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The effect of nozzle aspect ratio (wH) (major axis to minor axis ratio) on the velocity eld of a turbulent plane jet is inves-tigated using a hot-wire anemometer. The aspect ratios investi-gated were in the range 10 w H 60. The initial turbulence intensity proles exhibit a lower intensity
Results 11 - 20
of
547
