Journal ArticleDOI
Criteria for the selection of stochastic models of particle trajectories in turbulent flows
TLDR
In this paper, the relationships between the various criteria are examined for a very general class of models and it is shown that most of the criteria are equivalent and also how a model can be designed to satisfy these criteria exactly and to be consistent with inertial-subrange theory.Abstract:
Many different random-walk models of dispersion in inhomogeneous or unsteady turbulence have been proposed and several criteria have emerged to distinguish good models from bad. In this paper the relationships between the various criteria are examined for a very general class of models and it is shown that most of the criteria are equivalent. It is also shown how a model can be designed to satisfy these criteria exactly and to be consistent with inertial-subrange theory. Some examples of models that obey the criteria are described. As an illustration some calculations of dispersion in free-convective conditions are presented.read more
Citations
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Journal ArticleDOI
Field measurements of airborne concentration and deposition rate of maize pollen
Nathalie Jarosz,Benjamin Loubet,Brigitte Durand,Alastair McCartney,Xavier Foueillassar,Laurent Huber +5 more
TL;DR: The results of experiments that measured maize pollen dispersal from a 20 m x 20 m experimental crop were done in a commercial farm in France during the summer of 2000 as mentioned in this paper, and the results indicated that only a small proportion of the released from the crop would have been still airborne at distances greater than 30 m from the source.
Journal ArticleDOI
Particle dispersion in the developing free shear layer. Part 2. Forced flow
B. J. Lázaro,Juan C. Lasheras +1 more
TL;DR: In this paper, an experimental investigation of the dispersion of small particles in a developing, high-Reynolds-number, turbulent, plane mixing layer is presented, where flow visualizations, laser attenuation and diffraction techniques as well as hot-wire anemometry are used to describe the evolution of the mean and instantaneous particle and gas flow fields.
Journal ArticleDOI
The Multifractal Lagrangian Nature of Turbulence
TL;DR: In this article, the eulerian statistics of small-scale dynamics in turbulent flows are used to predict properties of the probability distribution of the local energy dissipation rate at a fixed point.
Book ChapterDOI
Hitch-hiking on floating marine debris: macrobenthic species in the Western Mediterranean Sea
Stefano Aliani,Anne Molcard +1 more
TL;DR: In this paper, the authors report on the benthic invertebrates living on marine debris transported by wind and surface currents over the western Mediterranean Sea and estimate the distances that may be covered by hitch-hiking species and the contribution of rafting to the theoretical dispersal of species.
Journal ArticleDOI
Turbulence statistics inside and over forest: influence on footprint prediction
TL;DR: In this paper, the impact of roughness-sublayer (RSL) effects, and the influence of stability on similarity functions, are studied using observations, and it is found that thermal stability affects significantly the footprint function above the forest canopy.
References
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Journal ArticleDOI
An Introduction to Probability Theory and Its Applications.
Journal ArticleDOI
Turbulence Structure in the Convective Boundary Layer
TL;DR: In this paper, a boundary layer experiment conducted over a flat site in northwestern Minnesota is discussed, where wind and temperature fluctuations near the ground were measured with AFCRL's fast-response instrumentation on a 32 m tower with MRU probes attached at five different heights to the tethering cable of a 1300 m2 kite balloon.
Book
Theory and Applications of Stochastic Differential Equations
Zeev Schuss,Robert O'Malley +1 more
TL;DR: Presents theory, sources, and applications of stochastic differential equations of Ito's type; those containing white noise; and the role of partial differential equations in this context.