CCPortal
DOI10.1016/j.atmosres.2021.105507
New consideration of lateral boundary treatment for meso- and micro-scale nested PBL simulations over complex terrain
Zhao Z.; Xiao Y.; Li C.; Wang J.; Hu G.
Date Issued2021
ISSN0169-8095
Volume254
Other AbstractA detailed planetary boundary layer (PBL) flow over complex terrain can be simulated by nesting mesoscale numerical weather prediction (NWP) models and microscale computational fluid dynamics (CFD). When fully prescribed lateral boundaries are encountered, the over-specified treatment of CFD or limited-area models may result in ill-posedness and numerical instabilities. Such behaviors are due to inconsistent governing equations, turbulent viscosity models, and underlying surfaces between meso- and micro-scale formulations. In this study, by applying the relaxation treatment in marginal zones of CFD, its wind components are forced toward the externally specified NWP values. The relaxation schemes, deduced from simple advective transport equations, are optimized using genetic algorithms. Their numerical abilities in absorbing wave reflections on shallow-water systems are more efficient than the published approach. Then, key questions concerning the selection of relaxation strength, turbulence model constants, and prognostic variables specified on NWP–CFD nested boundaries are systemically investigated in the neutrally stratified Askervein Hill case. The relaxation scheme from simpler systems also performs effectively in CFD and decreases the adaption distance of wind velocities near over-specified outlet boundaries. A full set approach to obtain well-posed PBL solutions from the microscale domains sustained with inflow boundaries from NWP is proposed and validated. © 2021 Elsevier B.V.
enkeywordsComplex terrain; Genetic algorithms; Limited-area models; NWP-CFD; PBL parameterization
journalAtmospheric Research
Document Type期刊论文
Identifierhttp://gcip.llas.ac.cn/handle/2XKMVOVA/236831
AffiliationSchool of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, China; Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands
Recommended Citation
GB/T 7714
Zhao Z.,Xiao Y.,Li C.,et al. New consideration of lateral boundary treatment for meso- and micro-scale nested PBL simulations over complex terrain[J],2021,254.
APA Zhao Z.,Xiao Y.,Li C.,Wang J.,&Hu G..(2021).New consideration of lateral boundary treatment for meso- and micro-scale nested PBL simulations over complex terrain.Atmospheric Research,254.
MLA Zhao Z.,et al."New consideration of lateral boundary treatment for meso- and micro-scale nested PBL simulations over complex terrain".Atmospheric Research 254(2021).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhao Z.]'s Articles
[Xiao Y.]'s Articles
[Li C.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhao Z.]'s Articles
[Xiao Y.]'s Articles
[Li C.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhao Z.]'s Articles
[Xiao Y.]'s Articles
[Li C.]'s Articles
Terms of Use
No data!
Social Bookmark/Share

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.