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Title: Assessment of Vertical Mesh Refinement in Concurrently Nested Large-Eddy Simulations Using the Weather Research and Forecasting Model

Journal Article · · Monthly Weather Review
 [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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To facilitate multiscale simulation using the Weather Research and Forecasting Model, vertical mesh refinement for one-way concurrent nested simulation was recently introduced. Grid refinement in the vertical dimension removes the requirement of different grid aspect ratios on the bounding versus the nested domain, such that results from refinement are in the horizontal directions only, and thereby can also reduce numerical errors on the bounding domain arising from large aspect ratios in the presence of complex terrain. Herein, the impacts of vertical grid refinement on the evolving downstream flow in nested large-eddy simulations are evaluated in relation to other model configuration choices, including turbulence subfilter-scale (SFS) stress models, mesh configuration, and alternative methods for calculating several near-surface flow parameters. Although vertical nesting requires coarsening of the vertical grid on the bounding domain, leading to a smaller range of resolved turbulence scales in the nest’s lateral boundary conditions, parameter values within the nested domains are generally only minimally impacted, relative to nesting using the same vertical grid on each domain. Two dynamic SFS models examined herein generally improved the simulated mean wind speed, turbulence kinetic energy, stresses and spectra, on both domains, and accelerated equilibration rates within nested domains, relative to two constant coefficient models. Here, a new method of extrapolating horizontal velocity components to near-surface locations at nested domain lateral boundaries, and a correction to the calculation of deformation elements near the surface, are each shown to slightly alter the mean parameter values, yet only minimally impact equilibration rates within the nested domain.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1580198
Alternate ID(s):
OSTI ID: 1488779
Report Number(s):
LLNL-JRNL-703119; 837009
Journal Information:
Monthly Weather Review, Vol. 145, Issue 8; ISSN 0027-0644
Publisher:
American Meteorological SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

References (19)

Large-eddy simulation of a neutrally stratified boundary layer: A comparison of four computer codes journal October 1994
A scale-dependent Lagrangian dynamic model for large eddy simulation of complex turbulent flows journal February 2005
Designing large-eddy simulation of the turbulent boundary layer to capture law-of-the-wall scaling journal February 2010
Large-Eddy Simulation Of Neutral Turbulent Flow Over Rough Sinusoidal Ridges journal March 2001
Explicit Filtering and Reconstruction Turbulence Modeling for Large-Eddy Simulation of Neutral Boundary Layer Flow journal July 2005
A New Vertical Grid Nesting Capability in the Weather Research and Forecasting (WRF) Model journal October 2016
Large-Eddy Simulation of Very-Large-Scale Motions in the Neutrally Stratified Atmospheric Boundary Layer journal February 2015
Evidence of very long meandering features in the logarithmic region of turbulent boundary layers journal May 2007
Implementation and Evaluation of Dynamic Subfilter-Scale Stress Models for Large-Eddy Simulation Using WRF* journal January 2012
Subgrid-scale modelling for the large-eddy simulation of high-Reynolds-number boundary layers journal April 1997
A Large Eddy Simulation Study of a Quasi-Steady, Stably Stratified Atmospheric Boundary Layer journal April 2000
An Improved Numerical Approximation of the Horizontal Gradients in a Terrain-Following Coordinate System journal May 1984
Stochastic backscatter in large-eddy simulations of boundary layers journal September 1992
Implementation of a Nonlinear Subfilter Turbulence Stress Model for Large-Eddy Simulation in the Advanced Research WRF Model journal November 2010
Transition and Equilibration of Neutral Atmospheric Boundary Layer Flow in One-Way Nested Large-Eddy Simulations Using the Weather Research and Forecasting Model journal March 2013
A Large-Eddy-Simulation Model for the Study of Planetary Boundary-Layer Turbulence journal July 1984
A New Terrain-Following Vertical Coordinate Formulation for Atmospheric Prediction Models journal October 2002
General Circulation Experiments with the Primitive Equations: i. the Basic Experiment* journal March 1963
A comparison of two dynamic subgrid closure methods for turbulent thermal convection journal February 1994

Cited By (2)

Crossing Multiple Gray Zones in the Transition from Mesoscale to Microscale Simulation over Complex Terrain journal May 2019
Crossing multiple gray zones in the transition from mesoscale to microscale simulation over complex terrain text January 2019

Figures / Tables (17)

TABLE 1.(p. 34)table TABLE 1.
FIG. 1.(p. 38)figure FIG. 1.
FIG. 2.(p. 39)figure FIG. 2.
FIG. 3.(p. 40)figure FIG. 3.
FIG. 4.(p. 41)figure FIG. 4.
FIG. 5.(p. 42)figure FIG. 5.
FIG. 6.(p. 43)figure FIG. 6.
FIG. 7.(p. 44)figure FIG. 7.
FIG. 8.(p. 45)figure FIG. 8.
FIG. 9.(p. 46)figure FIG. 9.
FIG. 10.(p. 47)figure FIG. 10.
FIG. 11.(p. 48)figure FIG. 11.
FIG. 12.(p. 49)figure FIG. 12.
FIG. 13.(p. 50)figure FIG. 13.
FIG. 14.(p. 51)figure FIG. 14.
FIG. 15.(p. 52)figure FIG. 15.
FIG. 16.(p. 53)figure FIG. 16.

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17 WIND ENERGY
Boundary conditions
Large eddy simulations
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Vertical coordinates