Urban Turbulence Velocity Spectra From JU2003 Observation

Abstract

A simple analytical form is used to model turbulent velocity spectra. This form has 2 free constants that can be calculated by turbulence measurements with a non-linear curve fitting method. The Joint Urban 2003 (JU2003) field experiments were undertaken in Oklahoma City during the summer of 2003. Sonic anemometer data taken using Lawrence Livermore National Laboratory s 83 m pseudo tower from JU2003 are analyzed. We present the results of characteristics of the urban turbulence velocity spectra. In particular, we focus on the features of spectral peak frequency and wavelength. Their variations with wind direction and atmospheric stability, within and above the urban canopy, are discussed in detail.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2014
Accession Number
ADA612634

Entities

People

  • Ananth Sridhar
  • Cheryl Klipp
  • Giap Huynh
  • Sam Chang

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Anemometers
  • Atmospheric Motion
  • Boundary Layer
  • Curve Fitting
  • Data Analysis
  • Frequency
  • Information Science
  • Measurement
  • Military Research
  • Observation
  • Oklahoma
  • Spectra
  • Standards
  • Turbulence
  • Urban Areas
  • Wind
  • Wind Direction

Fields of Study

  • Environmental science

Readers

  • Fluid Dynamics.
  • Nuclear Civil Defense.
  • Spectroscopy.