WIND TUNNEL STUDIES OF THE AIR FLOW AND GASEOUS PLUME DIFFUSION IN THE LEADING EDGE AND DOWNSTREAM REGIONS OF A MODEL FOREST

Abstract

A model forest canopy was designed to simulate the meteorological characteristics of typical live forests. Measurements were made of velocity, turbulence, drag, and gaseous plume behavior. Flow properties are compared with recent field measurements. Ground penetration in the initial fetch region results in strikingly different streamline motion as compared to wind motions within the equilibrium regions. Measured values of the vertical eddy diffusion coefficient are shown to predict plume behavior in the equilibrium region very well if a correction is included for the ratio Ky/Kz > 1.0. Ventilation of an elevated line source into the canopy region is compared with a simple one- dimensional model.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1969
Accession Number
AD0703892

Entities

People

  • B. T. Yang
  • R. N. Meroney

Organizations

  • Colorado State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Air Flow
  • Civil Engineering
  • Computational Science
  • Detection
  • Diffusion Coefficient
  • Equations
  • Flow
  • Fluid Dynamics
  • Fluid Mechanics
  • Leading Edges
  • Measurement
  • Mechanics
  • Tree Canopy
  • Turbulence
  • Turbulent Diffusion
  • Wind Tunnels

Readers

  • Aerosol Science/Aerosol Physics
  • Fluid Dynamics.
  • Forest Ecology