On Estimation of the Contribution of Secondary Vortex Structures to the Transport of Aerosols in the Atmospheric Boundary Layer

IF 1 4区工程技术 Q4 MECHANICS

Fluid Dynamics Pub Date : 2023-03-02 DOI:10.1134/S001546282208002X

M. A. Davydova, O. G. Chkhetiani, N. T. Levashova, A. L. Nechaeva

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Abstract—

In this paper, we consider two reasonable approaches to the problem of numerical simulation of the concentration distribution of a finely dispersed aerosol in spiral vortex structures (rolls) at the atmospheric boundary layer in order to estimate the contribution of vortex structures to the transport of aerosols through the boundary layer. Using the methods of perturbation theory, an approximate solution of a stationary spatially periodic singularly perturbed problem of the reaction–diffusion–advection type, which models the distribution of an aerosol in vortices, is obtained, the residual term is estimated, and a method for numerically solving the zero-approximation problem is proposed. As an alternative approach to the problem of numerical modeling of an aerosol-concentration field in rolls, implementation of the method of evolutionary factorization is considered. Using model data, an estimate of the amount of an aerosol carried by vortex structures is obtained.

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二次涡结构对大气边界层气溶胶输运贡献的估算

摘要:本文考虑了两种合理的方法来数值模拟大气边界层中精细分散的气溶胶在螺旋涡旋结构(卷)中的浓度分布，以估计涡旋结构对气溶胶在边界层中运移的贡献。利用摄动理论的方法，得到了模拟气溶胶在涡旋中的分布的反应-扩散-平流型平稳空间周期奇摄动问题的近似解，估计了残差项，提出了零逼近问题的数值求解方法。作为轧辊中气溶胶浓度场数值模拟问题的一种替代方法，考虑了进化分解方法的实现。利用模式资料，对涡旋结构所携带的气溶胶量进行了估计。

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来源期刊

Fluid Dynamics MECHANICS-PHYSICS, FLUIDS & PLASMAS

CiteScore

1.30

自引率

22.20%

发文量

审稿时长

6-12 weeks

期刊介绍： Fluid Dynamics is an international peer reviewed journal that publishes theoretical, computational, and experimental research on aeromechanics, hydrodynamics, plasma dynamics, underground hydrodynamics, and biomechanics of continuous media. Special attention is given to new trends developing at the leading edge of science, such as theory and application of multi-phase flows, chemically reactive flows, liquid and gas flows in electromagnetic fields, new hydrodynamical methods of increasing oil output, new approaches to the description of turbulent flows, etc.