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首页> 外文期刊>Applied Mathematical Modelling >Block mesh refinement for incompressible flows in curvilinear domains
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Block mesh refinement for incompressible flows in curvilinear domains

机译:曲线域中不可压缩流的块网格细化

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摘要

A method for the solution of the Navier-Stokes equation for the prediction of flows inside domains of arbitrary shaped bounds by the use of Cartesian grids with block-refinement in space is presented. In order to avoid the complexity of the body fitted numerical grid generation procedure, we use a saw tooth method for the curvilinear geometry approximation. By using block-nested refinement, we achieved the desired geometry Cartesian approximation in order to find an accurate solution of the N-S equations. The method is applied to incompressible laminar flows and is based on a cell-centred approximation. We present the numerical simulation of the flow field for two geometries, driven cavity and stenosed tubes. The utility of the algorithm is tested by comparing the convergence characteristics and accuracy to those of the standard single grid algorithm. The Cartesian block refinement algorithm can be used in any complex curvilinear geometry simulation, to accomplish a reduction in memory requirements and the computational time effort.
机译:提出了一种求解Navier-Stokes方程的方法,该方法通过使用在空间上具有块细化的笛卡尔网格来预测任意形状边界的域内的流量。为了避免人体拟合数值网格生成过程的复杂性,我们使用锯齿法进行曲线几何近似。通过使用块嵌套优化,我们找到了所需的几何笛卡尔近似,以便找到N-S方程的精确解。该方法适用于不可压缩的层流,并且基于单元中心近似。我们提出了两种几何形状(从动腔和狭窄管)的流场的数值模拟。通过将收敛性和准确性与标准单网格算法的收敛性和准确性进行比较,测试了该算法的实用性。笛卡尔块细化算法可用于任何复杂的曲线几何模拟中,以减少内存需求并减少计算时间。

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