Abstract Anisotropic prismatic/strand meshes are often used to capture viscous boundary layer effects in Reynolds Averaged Navier Stokes (RANS) simulations of high Reynolds number flows. This paper describes a new algorithm for generation of prismatic meshes using the minimum distance field of the surface tessellation. The algorithm starts with initial point placement using both the direction of best visibility and the direction to the closest point on the minimum distance iso-surface. Initial point placement is followed by a constrained smoothing operation based on an elastic spring analogy. The constraints ensure movement of nodes is restricted to the iso-surface of the distance field and within the region of visibility. Simulations are performed using a dual-mesh infrastructure, where the prismatic meshes transition to a Cartesian background mesh a short distance from the wall. This overset mesh system is processed by a domain connectivity method to establish connections between self-intersecting strand meshes and strand/Cartesian mesh systems. Mesh and flow simulation results are presented for test cases of varying complexity.

中文翻译：

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使用最小距离场生成棱柱网格

摘要 在高雷诺数流动的雷诺平均纳维斯托克斯 (RANS) 模拟中，各向异性棱柱/股状网格常用于捕捉粘性边界层效应。本文描述了一种使用曲面细分的最小距离场生成棱柱网格的新算法。该算法从使用最佳可见性方向和到最小距离等值面上最近点的方向的初始点放置开始。初始点放置之后是基于弹性弹簧类比的约束平滑操作。这些约束确保节点的移动被限制在距离场的等值面和可见区域内。使用双网格基础设施进行模拟，其中棱柱网格过渡到距墙壁很短距离的笛卡尔背景网格。这种重叠网格系统通过域连接方法进行处理，以在自相交链网格和链/笛卡尔网格系统之间建立连接。针对不同复杂性的测试用例提供了网格和流模拟结果。