تقرير
Addressing the Grid-size Sensitivity Issue in Large-eddy Simulations of Stable Boundary Layers
العنوان: | Addressing the Grid-size Sensitivity Issue in Large-eddy Simulations of Stable Boundary Layers |
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المؤلفون: | Dai, Yi, Basu, Sukanta, Maronga, Björn, de Roode, Stephan R |
سنة النشر: | 2020 |
المجموعة: | Physics (Other) |
مصطلحات موضوعية: | Physics - Atmospheric and Oceanic Physics |
الوصف: | In this study, we have identified certain fundamental limitations of a mixing length parameterization used in a popular turbulent kinetic energy-based subgrid-scale model. Replacing this parameterization with a more physically realistic one significantly improves the overall quality of the large-eddy simulations (LESs) 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). |
نوع الوثيقة: | Working Paper |
DOI: | 10.1007/s10546-020-00558-1 |
URL الوصول: | http://arxiv.org/abs/2003.09463 |
رقم الأكسشن: | edsarx.2003.09463 |
قاعدة البيانات: | arXiv |
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