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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Book ChapterDOI
Diffusion of Heavy Particles in a Turbulent Flow
TL;DR: In this paper, the authors derived expressions for the far-field eddy diffusivity and particle velocity statistics of a cloud of heavy particles in isotropic turbulence, in terms of statistics of the fluid flow.
Journal ArticleDOI
Diagnosis of wind flow and dispersion over complex terrain based on limited meteorological data
TL;DR: In this paper, an estimation of SO2 dispersion over complex terrain is attempted, using the diagnostic wind field generated from limited meteorological data, which aims to face the realistic requirement of emergency response in case of industrial plants settled in poorly instrumented areas.
Journal ArticleDOI
A wavelet-based approach to detect climate change on the coherent and turbulent component of the atmospheric circulation
Davide Faranda,Dimitri Defrance +1 more
TL;DR: In this paper, the effects of climate changes on these two components separately by applying a wavelet analysis to the 700 hPa wind fields obtained in climate simulations for different forcing scenarios.
Journal ArticleDOI
Formulation of stability-dependent empirical relations for turbulent intensities from surface layer turbulence measurements for dispersion parameterization in a lagrangian particle dispersion model
K. B. R. R. Hari Prasad,C. V. Srinivas,A. N. V. Satyanarayana,C. V. Naidu,R. Baskaran,B. Venkatraman +5 more
TL;DR: In this article, the authors derived season and stability-dependent turbulence intensity from experimental turbulence measurements following surface layer scaling and local stability at the tropical coastal site Kalpakkam, India for atmospheric dispersion parameterization.
Journal ArticleDOI
Comparison of the Moist Parcel-in-Cell (MPIC) model with large-eddy simulation for an idealized cloud
TL;DR: In this paper, the ascent of a moist thermal is used to test a recently developed essentially Lagrangian model for simulating moist convection, which has the advantage that the parcels provide an efficient and explicit representation of subgrid scale flow.
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.