Particle-resolved simulations of turbulent particle-laden flows provide a powerful research tool to explore detailed flow physics at all scales. However, efficient particle-resolved simulations for wall-bounded turbulent particle-laden flows remain a challenging task. In this article, we develop a simulation approach for a turbulent channel flow laden with finite-size particles on a nonuniform mesh by combining the discrete unified gas kinetic scheme (DUGKS) and the immersed boundary method (IBM). The standard discrete delta function was modified according to reproducible kernel particle method to take into account mesh non-uniformity and correctly conserve force moments. Simulation results based on uniform and nonuniform meshes are compared to validate and examine the accuracy of the nonuniform mesh DUGKS-IBM. Finally, the computational performance of the nonuniform mesh DUGKS-IBM is discussed.

中文翻译：

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非均匀正交网格上含颗粒湍流通道流的浸没边界法-离散统一气体动力学方案模拟

充满粒子的湍流的粒子解析模拟为探索所有尺度的详细流动物理提供了强大的研究工具。然而，对壁面湍流粒子负载流进行有效的粒子解析模拟仍然是一项具有挑战性的任务。在本文中，我们通过结合离散统一气体动力学方案 (DUGKS) 和浸入边界法 (IBM)，开发了一种针对非均匀网格上充满有限尺寸颗粒的湍流通道流的模拟方法。根据可再现核粒子方法修改标准离散δ函数，以考虑网格不均匀性并正确守恒力矩。比较基于均匀网格和非均匀网格的仿真结果，以验证和检查非均匀网格 DUGKS-IBM 的准确性。最后，讨论了非均匀网格 DUGKS-IBM 的计算性能。