A simple and scalable immersed boundary method for high-fidelity simulations of fixed and moving objects on a Cartesian mesh
A simple and scalable immersed boundary method for high-fidelity simulations of fixed and moving objects on a Cartesian mesh
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DOI：
10.1016/j.apm.2021.06.026
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发表时间：
2021-11
影响因子：
5
通讯作者：
A. E. Giannenas;S. Laizet
中科院分区：
文献类型：
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作者：
A. E. Giannenas;S. Laizet
提出了一种基于三次样条重构的浸没边界方法，用于在笛卡尔网格上对湍流中的浸没物体进行高保真模拟。IBM的新奇在于它的简单性，准确性，可扩展性和模拟固定和移动的沉浸式对象的能力。新的IBM是彻底验证对1D基准，与2D绕圆柱体在Re = 40和300和3D绕球体在Re = 300和Re = 3700流。收敛性研究和详细的误差图显示的空间分布的速度L 2-范数误差相比，在R e= 40的圆柱体的光谱参考解决方案显示所提出的方法的鲁棒性。该方法的成本和性能还介绍了高达65，536个计算核心的数十亿网格节点模拟。通过两个后俯仰襟翼对方形海崖体尾流的控制，证明了该方法在实际应用中处理多个运动物体的潜力。
A simple and scalable Immersed Boundary Method based on cubic spline reconstructions is presented for high-fidelity simulations of immersed objects in a turbulent flow on a Cartesian mesh. The novelty of the proposed IBM lies in its simplicity, accuracy, scalability and its ability to simulate both fixed and moving immersed objects. The new IBM is thoroughly validated against a 1D benchmark, with the 2D flow around a cylinder at R e= 40 and 300 and the 3D flow around a sphere at R e= 300 and R e= 3700. Convergence studies and detailed error maps showing the spatial distribution of the velocity L 2-Norm error compared to a spectral reference solution for the cylinders at R e= 40 show the robustness of the proposed method. The cost and performance of the method are also presented for multi-billion mesh node simulations with up to 65,536 computational cores. The potential of the method in handling multiple moving objects for practical applications is demonstrated with the control of a square bluff body wake by two rear pitching flaps.