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Numerical simulation of three-dimensional lee waves behind an isolated hill

机译:孤山后的三维Lee风的数值模拟

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摘要

Stably stratified fluid flow over smooth hills is an important process in environmental fluid mechanics. The aim of this article is to point out some of the key features of this phenomenon from both the physical and the mathematical modeling point of view. Three-dimensional laminar flow over a smooth, axisymmetric hill is considered for a range of values of the Froude number and the Reynolds number. The numerical simulations are performed on the basis of the Boussinesq approximation model, solved with a high-resolution compact finite-difference numerical scheme. The numerical results obtained are discussed with respect to the observed physical phenomena, taking into account the separate role of varying the velocity (Reynolds number) and stratification (Froude number). The mathematical modeling and numerical solvability issues encountered are discussed in detail, pointing out the key role of the computational setup and boundary conditions. (C) 2019 Elsevier Inc. All rights reserved.
机译:在光滑的丘陵上稳定分层的流体流动是环境流体力学中的重要过程。本文的目的是从物理和数学建模的角度指出这种现象的一些关键特征。对于一定范围的Froude数和Reynolds数,考虑在光滑的轴对称山丘上进行三维层流。数值模拟是在Boussinesq逼近模型的基础上进行的,并使用高分辨率的紧凑型有限差分数值方案进行求解。结合观察到的物理现象讨论了获得的数值结果,同时考虑了改变速度(雷诺数)和分层(弗洛德数)的单独作用。详细讨论了遇到的数学建模和数值可解性问题,指出了计算设置和边界条件的关键作用。 (C)2019 Elsevier Inc.保留所有权利。

著录项

  • 来源
    《Applied Mathematical Modelling》 |2020年第2期|648-664|共17页
  • 作者

    Bodnar Tomas; Fraunie Philippe;

  • 作者单位

    Czech Tech Univ Fac Mech Engn Dept Tech Math Karlovo Namesti 13 Prague 12135 2 Czech Republic|Czech Acad Sci Inst Math Zitna 25 Prague 11567 1 Czech Republic;

    Univ Toulon & Var Mediterranean Inst Oceanog UM USTV 110 AMU CNRS INSU 7294 IRD 235 BP 20132 F-83957 La Garde France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Stratified fluid; Finite difference; Lee waves; Flow over a hill;

    机译:分层流体;有限的差异;李波;流过一座小山;

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