A MATHEMATICAL MODEL FOR AIR FLOW IN A VEGETATIVE CANOPY

Abstract

The usual concept of surface roughness and zero plane displacement breaks down when one considers a vegetative canopy as the lower boundary for the planetary boundary layer. The roughness of many vegetative canopies derived from the log law changes with wind speed as do the zero-plane displacements. Ideally one would like to express the aerodynamic roughness of vegetation in terms of its height, density, and drag characteristics. Restricting considerations to the turbulent transfer of momentum, a model was developed that will predict the canopy wind profile within semi-rigid canopies. For the purpose of this report, a canopy is defined as that layer spanning the region from the ground surface to the top of the plant.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1966
Accession Number
AD0634668

Entities

People

  • Ronald M. Cionco

Organizations

  • United States Army Communications-Electronics Command

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Air Flow
  • Atmospheric Motion
  • Boundaries
  • Boundary Layer
  • Computational Science
  • Drag
  • Equations
  • Flow
  • Fluid Dynamics
  • Layers
  • Numerical Analysis
  • Reynolds Number
  • Roughness
  • Simulations
  • Turbulence
  • Wind
  • Wind Velocity

Readers

  • Aerial Delivery - Logistics and Supply Chain Management.
  • Atmospheric Remote Sensing.
  • Fluid Dynamics.