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An adaptive fully-Lagrangian meshless method for incompressible laminar flow airfoil studies

机译:不可压缩层流翼型研究的自适应全拉格朗日无网格方法

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摘要

Laminar incompressible flow around a NACA0012 airfoil placed in a free-stream at various incidences has been revisited with the use of a fully-Lagrangian meshless method based on a Smoothed Particle Hydrodynamics (SPH) formulation. Spatial adaptivity has been incorporated in the scheme via splitting and merging of SPH particles employing zonal criteria. In addition, a novel algorithm has been proposed here so that particle merging may be achieved, ensuring the robustness, accuracy and efficiency of the computational simulations. The results obtained have been benchmarked against available data from mesh-based methods. Good agreement has been found both in steady and unsteady flow regimes. Overall, the present work demonstrated the effectiveness and competitiveness of this meshfree approach for detailed studies in aerodynamics. (C) 2017 Elsevier Masson SAS. All rights reserved.
机译:已使用基于平滑粒子流体动力学(SPH)公式的完全拉格朗日无网格方法重新研究了以各种入射角置于自由流中的NACA0012机翼周围的层状不可压缩流动。通过使用区域标准拆分和合并SPH粒子,将空间适应性纳入了该方案。另外,这里提出了一种新颖的算法,从而可以实现粒子合并,从而确保计算仿真的鲁棒性,准确性和效率。已将获得的结果与基于网格方法的可用数据进行了基准比较。在稳态和非稳态流动状态下都发现了良好的一致性。总的来说,目前的工作证明了这种无网格方法在空气动力学详细研究中的有效性和竞争力。 (C)2017 Elsevier Masson SAS。版权所有。

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