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Flux-gradient Relationship for Turbulent Dispersion Over Complex Terrain : Volume 2, Issue 2 (30/11/-0001)

By Tampieri, F.

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Book Id: WPLBN0003985986
Format Type: PDF Article :
File Size: Pages 12
Reproduction Date: 2015

Title: Flux-gradient Relationship for Turbulent Dispersion Over Complex Terrain : Volume 2, Issue 2 (30/11/-0001)  
Author: Tampieri, F.
Volume: Vol. 2, Issue 2
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
-0001
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Tinarelli, G., Anfossi, D., Trombetti, F., Giostra, U., Tampieri, F., & Ferrero, E. (-0001). Flux-gradient Relationship for Turbulent Dispersion Over Complex Terrain : Volume 2, Issue 2 (30/11/-0001). Retrieved from http://worldebookfair.org/


Description
Description: Istituto FISBAT/CNR, Via Gobetti 101, 40129 Bologna, Italy. The transfer of a passive tracer in inhomogeneous turbulent flow is investigated. Starting from Lumley's constitutive equation, we derived an expression for the ratio between the effective eddy diffusivity K and eddy diffusivity K as a function of three length scales characterizing the local turbulence structure, flux variations and turbulence inhomogeneities. The theoretical predictions for the one-dimensional case of inhomogeneous symmetric turbulence were validated through a comparison with the numerical results of a Lagrangian particle model simulating a wind tunnel experiment of dispersion in the lee of an idealized two-dimensional hill. A qualitative agreement is reached between the theoretical evaluation of K and the value obtained from the numerical simulation.

Summary
Flux-gradient relationship for turbulent dispersion over complex terrain

 

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