A numerical study of heat island flows: Stationary solutions
A numerical study of heat island flows: Stationary solutions
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热岛流的数值研究：固定解
DOI：
10.1002/fld.1840
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发表时间：
2009
影响因子：
1.8
通讯作者：
R. Touzani
中科院分区：
文献类型：
--
作者：
T. Dubois;R. Touzani
本文对无界区域内的自然对流问题进行了二维数值模拟。通过地面上的热岛效应和垂直方向上的热力分层来诱导环流。这种稳定分层环境的主要作用是诱导热扰动在远离局部热源的水平方向上传播。在Ra 105的数值稳定的解决方案计算在大的细长的计算域：收敛性方面的域大小进行了研究，在不同的分辨率。在细网格上，网格尺寸${h} = {{1} \over {128}}$，在垂直边界处添加热海绵层：这种局部阻尼技术改善了相对于域长度的收敛性。Boussinesq方程采用交错网格上的二阶有限体积格式离散，时间积分采用二阶投影法。版权所有© 2008约翰威利父子有限公司.
We present two‐dimensional numerical simulations of a natural convection problem in an unbounded domain. The flow circulation is induced by a heat island located on the ground and thermal stratification is applied in the vertical direction. The main effect of this stably stratified environment is to induce the propagation of thermal perturbations in the horizontal direction far from the local thermal source. Numerical stationary solutions at Ra⩽105 are computed in large elongated computational domains: convergence with respect to the domain sizes is investigated at different resolutions. On fine grids, with mesh size ${h} = {{1} \over {128}}$, a thermal sponge layer is added at the vertical boundaries: this local damping technique improves the convergence with respect to the domain length. Boussinesq equations are discretized with a second‐order finite volume scheme on a staggered grid combined with a second‐order projection method for the time integration. Copyright © 2008 John Wiley & Sons, Ltd.
影响因子：
4.1
作者：
BERENGER, JP
通讯作者：
BERENGER, JP