Enrichment Methods for Inflow Turbulence Generation in the Atmospheric Boundary Layer

Eliot Quon, Aditya Ghate, Sanjiva Lele

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9 Scopus Citations


We investigate the feasibility of introducing synthetic turbulence into finite-domain large-eddy simulations (LES) of the wind plant operating environment. This effort is motivated by the need for a robust mesoscale-to-microscale coupling strategy in which a microscale (wind plant) simulation is driven by mesoscale data without any resolved microscale turbulence. A neutrally stratified atmospheric boundary layer was simulated in an LES with 10-m grid spacing. We show how such a fully developed turbulence field may be reproduced with spectral enrichment starting from an under-resolved coarse LES field (with 20-m and 40-m grid spacing). The velocity spectra of the under-resolved fields are enriched by superimposing a fluctuating velocity field calculated by two turbulence simulators: TurbSim and Gabor Kinematic Simulation. Both forms of enrichment accurately simulated the autospectra of all three velocity components at high wavenumbers, with agreement between the enriched fields and the full-resolution LES observed at 400 m from the inflow boundary. In contrast, the spectra of the unenriched fields reached the same fully developed state at four times the downstream distance.

Original languageAmerican English
Article numberArticle No. 072054
Number of pages10
JournalJournal of Physics: Conference Series
Issue number7
StatePublished - 19 Jun 2018
Event7th Science of Making Torque from Wind, TORQUE 2018 - Milan, Italy
Duration: 20 Jun 201822 Jun 2018

Bibliographical note

Publisher Copyright:
© Published under licence by IOP Publishing Ltd.

NREL Publication Number

  • NREL/JA-5000-71378


  • atmospheric boundary layer
  • kinematics
  • large eddy simulation
  • torque
  • turbulence
  • velocity


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