Addressing the Grid-Size Sensitivity Issue in Large-Eddy Simulations of Stable Boundary Layers

Yi Dai; Sukanta Basu; Björn Maronga; Stephan R. de Roode

doi:10.1007/s10546-020-00558-1

Addressing the Grid-Size Sensitivity Issue in Large-Eddy Simulations of Stable Boundary Layers

Yi Dai, Sukanta Basu^*, Björn Maronga, Stephan R. de Roode

^*Corresponding author for this work

Atmospheric Remote Sensing

Research output: Contribution to journal › Article › Scientific › peer-review

7 Citations (Scopus)

11 Downloads (Pure)

Abstract

We have identified certain fundamental limitations of a mixing-length parametrization used in a popular turbulent kinetic energy-based subgrid-scale model. Replacing this parametrization with a more physically realistic one significantly improves the overall quality of the large-eddy simulation (LES) of stable boundary layers. For the range of grid sizes considered here (specifically, 1 m–12.5 m), the revision dramatically reduces the grid-size sensitivity of the simulations. Most importantly, the revised scheme allows us to reliably estimate the first- and second-order statistics of a well-known LES intercomparison case, even with a coarse grid size of O(10 m).

Original language	English
Pages (from-to)	63-89
Number of pages	27
Journal	Boundary-Layer Meteorology
Volume	178
Issue number	1
DOIs	https://doi.org/10.1007/s10546-020-00558-1
Publication status	Published - 2020

Keywords

Buoyancy length scale
Prandtl number
Stable boundary layer
Subgrid-scale model

Access to Document

10.1007/s10546-020-00558-1

Dai2021_Article_AddressingTheGrid-SizeSensitivFinal published version, 1.54 MBLicence: CC BY

Cite this

@article{24dd5a8226224f62860ec36981c26512,

title = "Addressing the Grid-Size Sensitivity Issue in Large-Eddy Simulations of Stable Boundary Layers",

abstract = "We have identified certain fundamental limitations of a mixing-length parametrization used in a popular turbulent kinetic energy-based subgrid-scale model. Replacing this parametrization with a more physically realistic one significantly improves the overall quality of the large-eddy simulation (LES) of stable boundary layers. For the range of grid sizes considered here (specifically, 1 m–12.5 m), the revision dramatically reduces the grid-size sensitivity of the simulations. Most importantly, the revised scheme allows us to reliably estimate the first- and second-order statistics of a well-known LES intercomparison case, even with a coarse grid size of O(10 m).",

keywords = "Buoyancy length scale, Prandtl number, Stable boundary layer, Subgrid-scale model",

author = "Yi Dai and Sukanta Basu and Bj{\"o}rn Maronga and {de Roode}, {Stephan R.}",

year = "2020",

doi = "10.1007/s10546-020-00558-1",

language = "English",

volume = "178",

pages = "63--89",

journal = "Boundary-Layer Meteorology: an international journal of physical and biological processes in the atmospheric boundary layer",

issn = "0006-8314",

publisher = "Springer",

number = "1",

}

TY - JOUR

T1 - Addressing the Grid-Size Sensitivity Issue in Large-Eddy Simulations of Stable Boundary Layers

AU - Dai, Yi

AU - Basu, Sukanta

AU - Maronga, Björn

AU - de Roode, Stephan R.

PY - 2020

Y1 - 2020

N2 - We have identified certain fundamental limitations of a mixing-length parametrization used in a popular turbulent kinetic energy-based subgrid-scale model. Replacing this parametrization with a more physically realistic one significantly improves the overall quality of the large-eddy simulation (LES) of stable boundary layers. For the range of grid sizes considered here (specifically, 1 m–12.5 m), the revision dramatically reduces the grid-size sensitivity of the simulations. Most importantly, the revised scheme allows us to reliably estimate the first- and second-order statistics of a well-known LES intercomparison case, even with a coarse grid size of O(10 m).

AB - We have identified certain fundamental limitations of a mixing-length parametrization used in a popular turbulent kinetic energy-based subgrid-scale model. Replacing this parametrization with a more physically realistic one significantly improves the overall quality of the large-eddy simulation (LES) of stable boundary layers. For the range of grid sizes considered here (specifically, 1 m–12.5 m), the revision dramatically reduces the grid-size sensitivity of the simulations. Most importantly, the revised scheme allows us to reliably estimate the first- and second-order statistics of a well-known LES intercomparison case, even with a coarse grid size of O(10 m).

KW - Buoyancy length scale

KW - Prandtl number

KW - Stable boundary layer

KW - Subgrid-scale model

UR - http://www.scopus.com/inward/record.url?scp=85089733965&partnerID=8YFLogxK

U2 - 10.1007/s10546-020-00558-1

DO - 10.1007/s10546-020-00558-1

M3 - Article

AN - SCOPUS:85089733965

VL - 178

SP - 63

EP - 89

JO - Boundary-Layer Meteorology: an international journal of physical and biological processes in the atmospheric boundary layer

JF - Boundary-Layer Meteorology: an international journal of physical and biological processes in the atmospheric boundary layer

SN - 0006-8314

IS - 1

ER -

Addressing the Grid-Size Sensitivity Issue in Large-Eddy Simulations of Stable Boundary Layers

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this