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
Universality of the lagrangian velocity structure function constant (c0) across different kinds of turbulence
TL;DR: In this paper, the Lagrangian velocity structure function constant (C0) in the inertial subrange was evaluated in several different flows (grid turbulence, laboratory boundary-layer flow and the atmospheric surface layer under neutral stratification).
Journal ArticleDOI
Stochastic equations with multifractal random increments for modeling turbulent dispersion
M. S. Borgas,B. L. Sawford +1 more
TL;DR: In this paper, the Lagrangian intermittency effects, in the form of multifractal scaling, independently derived from Eulerian measurements, are used to develop a new model.
Journal ArticleDOI
Application of a model system for the study of transport and diffusion in complex terrain to the TRACT experiment
TL;DR: In this paper, the transport and diffusion processes of tracer gas released near the ground in the Rhine valley region, in Central Europe, during the 1992 TRACT field experiment, are simulated by a computational model system for complex terrain.
Journal ArticleDOI
Temporal variability of the NPP-GPP ratio at seasonal and interannual time scales in a temperate beech forest
TL;DR: In this paper, the temporal variability of the NPP-GPP ratio at interannual and seasonal scales for a young temperate beech stand, reporting dynamics for both leaves and woody organs, in particular stems.
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.