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DOI10.1016/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
ISSN03770265
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
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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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