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DOI | 10.1016/j.dynatmoce.2020.101191 |
On the analytical solution for two-dimensional convective plume and analytical modeling of the entrainment zone thickness | |
Vraciu C.V. | |
发表日期 | 2021 |
ISSN | 03770265 |
卷号 | 93 |
英文摘要 | Analytical solution for two-dimensional thermal plume updraft velocity is obtained under the assumption of a uniform temperature excess inside the plume. In this way, the thermal plume motion is modeled in both mixed layer and entrainment zone. Also, a semi-analytical solution is obtained using an empirical model for the plume temperature excess in the mixed layer. In addition, an analytical model for entrainment zone thickness is obtained by computing the overshoot distance of the modeled plumes, and a semi-analytical model by using the empirical model for plume temperature. By using a nonlinear profile for the lapse rate in the surface layer based on the Monin–Obukhov similarity theory, our model predicts that the characteristics of the surface layer plays an important role in the structure of the entrainment zone. Finally, our solutions for plume velocity allow us to consider the effect of the lateral entrainment on the plume excess temperature and velocity in the convective boundary layer. It is shown that the lateral entrainment has an important role on the plume dynamics and the solutions in the zero entrainment limit offer large overestimated values for the plume velocity, which also result in overestimated values of the entrainment zone thickness. © 2020 Elsevier B.V. |
英文关键词 | Analytical model; Convective boundary layer; Convective rolls; Entrainment zone thickness; Thermal plume |
语种 | 英语 |
scopus关键词 | Boundary layer flow; Boundary layers; Computation theory; Thermal plumes; Velocity; Convective boundary layers; Entrainment zone thickness; Nonlinear profiles; Plume temperature; Semi-analytical model; Semi-analytical solution; Similarity theory; Uniform temperature; Analytical models; analytical method; atmospheric plume; convective boundary layer; empirical analysis; entrainment; Monin-Obukhov theory; temperature anomaly; two-dimensional modeling |
来源期刊 | Dynamics of Atmospheres and Oceans |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/178278 |
作者单位 | Numerical Modelling Laboratory, National Meteorological Administration, Bucharest, Romania; Faculty of Physics, University of Bucharest, Bucharest-Magurele, Romania |
推荐引用方式 GB/T 7714 | Vraciu C.V.. On the analytical solution for two-dimensional convective plume and analytical modeling of the entrainment zone thickness[J],2021,93. |
APA | Vraciu C.V..(2021).On the analytical solution for two-dimensional convective plume and analytical modeling of the entrainment zone thickness.Dynamics of Atmospheres and Oceans,93. |
MLA | Vraciu C.V.."On the analytical solution for two-dimensional convective plume and analytical modeling of the entrainment zone thickness".Dynamics of Atmospheres and Oceans 93(2021). |
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