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
Flux Footprints Within and Over Forest Canopies
TL;DR: The characteristics of turbulence within a forest arespatially heterogeneous and distinct from those associated with the surface boundary layer as mentioned in this paper, and the size and probability distribution of flux footprints emanating from sources below the canopy have the potential to differ from those observed above forests.
Journal ArticleDOI
The Lagrangian particle dispersion model FLEXPART version 10.4
Ignacio Pisso,Espen Sollum,Henrik Grythe,Nina Iren Kristiansen,Nina Iren Kristiansen,Massimo Cassiani,Sabine Eckhardt,Delia Arnold,D. Morton,Rona Thompson,Christine Groot Zwaaftink,Nikolaos Evangeliou,Harald Sodemann,Leopold Haimberger,Stephan Henne,Dominik Brunner,John F. Burkhart,Anne Fouilloux,Jerome Brioude,Anne Philipp,Petra Seibert,Andreas Stohl +21 more
TL;DR: The Lagrangian particle dispersion model FLEXPART as mentioned in this paper was designed for calculating the long-range and mesoscale dispersion of hazardous substances from point sources, such as those released after an accident in a nuclear power plant.
Journal ArticleDOI
Processing and quality control of flux data during LITFASS-2003
Matthias Mauder,Claudia Liebethal,Mathias Göckede,Jens-Peter Leps,Frank Beyrich,Thomas Foken +5 more
TL;DR: In this paper, different aspects of the quality assurance and quality control (QA/QC) of micrometeorological measurements were combined to create a comprehensive algorithm which was then applied to experimental data from LITFASS-2003 (Lindenberg Inhomogeneous Terrain-Fluxes between Atmosphere and Surface: a long term study).
Journal ArticleDOI
Filtered particle tracking in isotropic turbulence and stochastic modeling of subgrid-scale dispersion
Jacek Pozorski,Sourabh V. Apte +1 more
TL;DR: In this article, a numerical study based on the Eulerian-Lagrangian formulation is performed for dispersed phase motion in a turbulent flow, and the role of subgrid scale turbulence on the statistics of heavy particles, including preferential concentration, is studied through a priori analysis of DNS of particle-laden forced isotropic turbulence.
Book ChapterDOI
A review of recent progress in our understanding of aeolian sediment transport
TL;DR: A review of recent progress in the understanding of aeolian sediment transport can be found in this paper, with emphasis on work published since 1985 and the current conceptual model of sediment transport discussed at length, with attention given to problems of definition that have arisen.
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.