Entrainment into sheared convective boundary layers as predicted by different large eddy simulation codes

Evgeni Fedorovich; Robert Conzemius; Igor Esau; Fotini Katopodes Chow; David Lewellen; Chin Hoh Moeng; Peter Sullivan; David Pino; Jordi Vilà Guerau De Arellano

Entrainment into sheared convective boundary layers as predicted by different large eddy simulation codes

Evgeni Fedorovich, Robert Conzemius, Igor Esau, Fotini Katopodes Chow, David Lewellen, Chin Hoh Moeng, Peter Sullivan, David Pino, Jordi Vilà Guerau De Arellano

Mesoscale & Microscale Meteorology Lab

Research output: Abstract › Paper › peer-review

45 Scopus citations

Abstract

Modifications of entrainment in the convective boundary layers (CBL) caused by wind shears were analyzed, and shear induced alterations of turbulence statistics of different kinds were demonstrated. All LES codes indicated that wind shears in CBL and across the entrainment zone by inducing vertical transport of heat and momentum in the upper portion of the CBL, and led to deeper regions of negative heat flux at the CBL top. Wind shear across CBL was also found to enhance convective entrainment and accelerate boundary layer growth compared to the shear-free CBL. Differences among the individual code-predicted CBL turbulence statistics were also found to incease with the order of statistics, but did not show noticeable dependence on wind shear.

Original language	English
Pages	685-698
Number of pages	14
State	Published - 2004
Event	16th Symposium on Boundary Layers and Turbulence - Portland, ME, United States Duration: Aug 9 2004 → Aug 13 2004

Conference

Conference	16th Symposium on Boundary Layers and Turbulence
Country/Territory	United States
City	Portland, ME
Period	08/9/04 → 08/13/04

Cite this

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title = "Entrainment into sheared convective boundary layers as predicted by different large eddy simulation codes",

abstract = "Modifications of entrainment in the convective boundary layers (CBL) caused by wind shears were analyzed, and shear induced alterations of turbulence statistics of different kinds were demonstrated. All LES codes indicated that wind shears in CBL and across the entrainment zone by inducing vertical transport of heat and momentum in the upper portion of the CBL, and led to deeper regions of negative heat flux at the CBL top. Wind shear across CBL was also found to enhance convective entrainment and accelerate boundary layer growth compared to the shear-free CBL. Differences among the individual code-predicted CBL turbulence statistics were also found to incease with the order of statistics, but did not show noticeable dependence on wind shear.",

author = "Evgeni Fedorovich and Robert Conzemius and Igor Esau and Chow, \{Fotini Katopodes\} and David Lewellen and Moeng, \{Chin Hoh\} and Peter Sullivan and David Pino and \{De Arellano\}, \{Jordi Vil{\`a} Guerau\}",

year = "2004",

language = "English",

pages = "685--698",

note = "16th Symposium on Boundary Layers and Turbulence ; Conference date: 09-08-2004 Through 13-08-2004",

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TY - CONF

T1 - Entrainment into sheared convective boundary layers as predicted by different large eddy simulation codes

AU - Fedorovich, Evgeni

AU - Conzemius, Robert

AU - Esau, Igor

AU - Chow, Fotini Katopodes

AU - Lewellen, David

AU - Moeng, Chin Hoh

AU - Sullivan, Peter

AU - Pino, David

AU - De Arellano, Jordi Vilà Guerau

PY - 2004

Y1 - 2004

N2 - Modifications of entrainment in the convective boundary layers (CBL) caused by wind shears were analyzed, and shear induced alterations of turbulence statistics of different kinds were demonstrated. All LES codes indicated that wind shears in CBL and across the entrainment zone by inducing vertical transport of heat and momentum in the upper portion of the CBL, and led to deeper regions of negative heat flux at the CBL top. Wind shear across CBL was also found to enhance convective entrainment and accelerate boundary layer growth compared to the shear-free CBL. Differences among the individual code-predicted CBL turbulence statistics were also found to incease with the order of statistics, but did not show noticeable dependence on wind shear.

AB - Modifications of entrainment in the convective boundary layers (CBL) caused by wind shears were analyzed, and shear induced alterations of turbulence statistics of different kinds were demonstrated. All LES codes indicated that wind shears in CBL and across the entrainment zone by inducing vertical transport of heat and momentum in the upper portion of the CBL, and led to deeper regions of negative heat flux at the CBL top. Wind shear across CBL was also found to enhance convective entrainment and accelerate boundary layer growth compared to the shear-free CBL. Differences among the individual code-predicted CBL turbulence statistics were also found to incease with the order of statistics, but did not show noticeable dependence on wind shear.

UR - https://www.scopus.com/pages/publications/23744461891

M3 - Paper

AN - SCOPUS:23744461891

SP - 685

EP - 698

T2 - 16th Symposium on Boundary Layers and Turbulence

Y2 - 9 August 2004 through 13 August 2004

ER -

Entrainment into sheared convective boundary layers as predicted by different large eddy simulation codes

Abstract

Conference

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