气候变化领域集成服务门户(CCPortal): Random Force Perturbations: A New Extension of the Cell Perturbation Method for Turbulence Generation in Multiscale Atmospheric Boundary Layer Simulations

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DOI	10.1029/2019MS001608
	Random Force Perturbations: A New Extension of the Cell Perturbation Method for Turbulence Generation in Multiscale Atmospheric Boundary Layer Simulations
	Mazzaro L.J.; Koo E.; Muñoz-Esparza D.; Lundquist J.K.; Linn R.R.
发表日期	2019
ISSN	19422466
起始页码	2311
结束页码	2329
卷号	11 期号:7
英文摘要	Coupling between mesoscale and large eddy simulation (LES) is critically important for many atmospheric model applications, from predictions of wind energy to fire propagation. The grid-nesting technique enables bridging between vastly different scales without incurring prohibitive computational costs. However, the transition from coarser to finer resolutions often requires a large number of grid points from inflow boundaries for the development of fine-scale turbulence features in the LES domain. Recently, the cell perturbation method (CPM) was developed to reduce the turbulence development region with high computational efficiency. Herein, we explore a new method based on the CPM that uses force perturbations in both the horizontal and vertical directions (Force Cell Perturbation Method) instead of the potential temperature perturbations in the original CPM, as an attempt to further explore the performance of the random perturbation techniques. This approach is tested for a neutral and a convective atmospheric boundary layer under idealized conditions. Overall, similar performance is found between the optimal configurations of the CPM and the Force Cell Perturbation Method pointing to the robustness of this family of perturbation methods in accelerating turbulence generation in nested domains. Vertical force perturbations performed better than horizontal force perturbations for both atmospheric stability conditions. The CPM performed best under convective stability conditions. The combination of the force and potential temperature perturbations is found to provide no additional performance improvement over the stand-alone application of the individual methods. ©2019. The Author.
英文关键词	atmospheric boundary layers; large eddy simulation; multiscale modeling; perturbation methods; turbulence; WRF
语种	英语
scopus关键词	Atmospheric boundary layer; Atmospheric thermodynamics; Atmospheric turbulence; Computational efficiency; Cytology; Large eddy simulation; Random processes; Turbulence; Wind power; Atmospheric stability; Convective atmospheric boundary layer; Fine-scale turbulence; Multi-scale Modeling; Perturbation method; Potential temperature; Standalone applications; Turbulence generation; Perturbation techniques; atmospheric modeling; boundary layer; large eddy simulation; numerical method; simulation
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156961
作者单位	Department of Atmospheric and Oceanic Sciences, University of Colorado Boulder, Boulder, CO, United States; Los Alamos National Laboratory, Los Alamos, NM, United States; National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Mazzaro L.J.,Koo E.,Muñoz-Esparza D.,et al. Random Force Perturbations: A New Extension of the Cell Perturbation Method for Turbulence Generation in Multiscale Atmospheric Boundary Layer Simulations[J],2019,11(7).
APA	Mazzaro L.J.,Koo E.,Muñoz-Esparza D.,Lundquist J.K.,&Linn R.R..(2019).Random Force Perturbations: A New Extension of the Cell Perturbation Method for Turbulence Generation in Multiscale Atmospheric Boundary Layer Simulations.Journal of Advances in Modeling Earth Systems,11(7).
MLA	Mazzaro L.J.,et al."Random Force Perturbations: A New Extension of the Cell Perturbation Method for Turbulence Generation in Multiscale Atmospheric Boundary Layer Simulations".Journal of Advances in Modeling Earth Systems 11.7(2019).