Relationship between Anisotropy and Dispersive Stress in Wind Plants with Variable Spacing

Large eddy simulations are considered for wind plants with varied spanwise and streamwise spacing. Data from five different configurations of staggered and aligned LES wind turbine arrays with a neutrally stratified atmospheric boundary layer are employed for analysis. Fields are analyzed by evaluat...

Full description

Bibliographic Details
Main Author: Dib, Tamara S.
Format: Others
Published: PDXScholar 2018
Subjects:
Online Access:https://pdxscholar.library.pdx.edu/open_access_etds/4335
https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=5354&context=open_access_etds
id ndltd-pdx.edu-oai-pdxscholar.library.pdx.edu-open_access_etds-5354
record_format oai_dc
spelling ndltd-pdx.edu-oai-pdxscholar.library.pdx.edu-open_access_etds-53542019-10-20T05:00:40Z Relationship between Anisotropy and Dispersive Stress in Wind Plants with Variable Spacing Dib, Tamara S. Large eddy simulations are considered for wind plants with varied spanwise and streamwise spacing. Data from five different configurations of staggered and aligned LES wind turbine arrays with a neutrally stratified atmospheric boundary layer are employed for analysis. Fields are analyzed by evaluating the anisotropy stress invariants based on the Reynolds shear stresses and dispersive stress tensor. The relationship between quantities are drawn as a function of the wind plant packing. Reynolds stresses and dispersive stresses are investigated alongside a domain altered version of the second and third scalar invariants, ξ, η, as well as the combination of the two invariants described by the function F = 1−27η 2 + 54ξ 3. F is a measure of the approach to either a two-component turbulence (F=1) or an isotropic turbulence (F=0). The invariant η describes the degree of anisotropy while ξ describes the characteristic shape. For the purposes of this study, the LES data is analyzed to understand the effects of canopy density on anisotropy and dispersive stresses, adding further insight and detail for future modeling techniques. 2018-03-12T07:00:00Z text application/pdf https://pdxscholar.library.pdx.edu/open_access_etds/4335 https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=5354&context=open_access_etds Dissertations and Theses PDXScholar Wind turbines Turbulence -- Measurement Anisotropy Mechanical Engineering
collection NDLTD
format Others
sources NDLTD
topic Wind turbines
Turbulence -- Measurement
Anisotropy
Mechanical Engineering
spellingShingle Wind turbines
Turbulence -- Measurement
Anisotropy
Mechanical Engineering
Dib, Tamara S.
Relationship between Anisotropy and Dispersive Stress in Wind Plants with Variable Spacing
description Large eddy simulations are considered for wind plants with varied spanwise and streamwise spacing. Data from five different configurations of staggered and aligned LES wind turbine arrays with a neutrally stratified atmospheric boundary layer are employed for analysis. Fields are analyzed by evaluating the anisotropy stress invariants based on the Reynolds shear stresses and dispersive stress tensor. The relationship between quantities are drawn as a function of the wind plant packing. Reynolds stresses and dispersive stresses are investigated alongside a domain altered version of the second and third scalar invariants, ξ, η, as well as the combination of the two invariants described by the function F = 1−27η 2 + 54ξ 3. F is a measure of the approach to either a two-component turbulence (F=1) or an isotropic turbulence (F=0). The invariant η describes the degree of anisotropy while ξ describes the characteristic shape. For the purposes of this study, the LES data is analyzed to understand the effects of canopy density on anisotropy and dispersive stresses, adding further insight and detail for future modeling techniques.
author Dib, Tamara S.
author_facet Dib, Tamara S.
author_sort Dib, Tamara S.
title Relationship between Anisotropy and Dispersive Stress in Wind Plants with Variable Spacing
title_short Relationship between Anisotropy and Dispersive Stress in Wind Plants with Variable Spacing
title_full Relationship between Anisotropy and Dispersive Stress in Wind Plants with Variable Spacing
title_fullStr Relationship between Anisotropy and Dispersive Stress in Wind Plants with Variable Spacing
title_full_unstemmed Relationship between Anisotropy and Dispersive Stress in Wind Plants with Variable Spacing
title_sort relationship between anisotropy and dispersive stress in wind plants with variable spacing
publisher PDXScholar
publishDate 2018
url https://pdxscholar.library.pdx.edu/open_access_etds/4335
https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=5354&context=open_access_etds
work_keys_str_mv AT dibtamaras relationshipbetweenanisotropyanddispersivestressinwindplantswithvariablespacing
_version_ 1719272171638882304