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首页> 外文会议>Computers and information in engineering conference;ASME international design engineering technical conferences and computers and information in engineering conference >PARALLEL IMPLEMENTATION OF PERIODIC BOUNDARY CONDITIONS FOR A CURVILINEAR IMMERSED BOUNDARY METHOD
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PARALLEL IMPLEMENTATION OF PERIODIC BOUNDARY CONDITIONS FOR A CURVILINEAR IMMERSED BOUNDARY METHOD

机译：曲线浸入式边界方法的周期边界条件的并行实现

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摘要

In this paper, a periodic boundary condition is implemented for 3D unsteady finite volume solver for incompressible Navier-Stokes equations on curvilinear structured grids containing moving immersed boundaries of arbitrary geometrical complexity. The governing equations are discretized with second-order accuracy on a hybrid staggeredon-staggered grid layout. The discrete equations are integrated in time via a second-order fractional step method. To resolve all the relevant scales in the flow accurately, a high-resolution curvilinear mesh is required, i.e., the simulations are computationally expensive. Therefore, high-performance parallel computing is essential to obtain results within reasonable time for practical applications. The main challenge with the implantation of the parallel periodic boundary condition is to update information at ghost nodes on different processors. An efficient parallel algorithm is implemented to update the ghost nodes for the periodic boundary condition. The parallel implementation is tested by comparing the results with analytical solutions, which are found to be in excellent agreement with each other. The parallel performance of the solver with the periodic boundary condition is also investigated for different cases.
机译：在本文中，针对包含运动任意浸入边界的任意几何复杂度的曲线结构网格上的不可压缩Navier-Stokes方程，为3D非稳态有限体积求解器实现了周期边界条件。在混合交错/非交错网格布局上，控制方程以二阶精度离散化。离散方程通过二阶分数步法在时间上积分。为了准确地解析流中的所有相关比例，需要高分辨率的曲线网格，即，模拟在计算上是昂贵的。因此，对于实际应用而言，高性能并行计算对于在合理的时间内获得结果至关重要。植入并行周期性边界条件的主要挑战是更新不同处理器上的虚影节点处的信息。实现了一种有效的并行算法，以针对周期性边界条件更新幻影节点。通过将结果与分析解决方案进行比较，对并行实现进行了测试，发现分析解决方案彼此之间非常吻合。还针对不同情况研究了具有周期性边界条件的求解器的并行性能。

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