A parallel overset-curvilinear-immersed boundary framework for simulating complex 3D incompressible flows.
A parallel overset-curvilinear-immersed boundary framework for simulating complex 3D incompressible flows.
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DOI：
10.1016/j.compfluid.2013.02.017
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发表时间：
2013-04-01
影响因子：
2.8
通讯作者：
Sotiropoulos, Fotis
中科院分区：
文献类型：
--
作者：
Borazjani, Iman;Ge, Liang;Le, Trung;Sotiropoulos, Fotis
我们开发了一种在一般非惯性参考系中的重叠曲线浸没边界（重叠-CURVIB）方法来模拟各种具有挑战性的生物流动问题。该方法采用重叠曲线网格，以有效地处理多连接的几何形状，并提高局部浸入边界附近的分辨率。经历任意大变形的复杂物体可以嵌入在重叠曲线背景网格内，并使用曲线浸入边界（CURVIB）方法（Ge和Sotiropoulos，Journal of Computational Physics，2007）作为尖锐界面处理。不可压缩流方程在一般非惯性参考系中制定，以提高数值方法的整体通用性和效率。有效的搜索算法，以确定需要消隐，供体细胞，和插值系数，用于构建在重叠网格的网格接口的边界条件的区域开发和实施，使用高效的并行计算通信策略，子域之间的信息传输。控制方程离散使用二阶精度有限体积法和集成的时间通过一个有效的分步方法。各种战略，以确保全球保守的插值网格接口适用于不可压缩流分步方法的实施和评估。对实验数据的方法进行了验证和验证，其能力证明了通过模拟流过去多个水上游泳者和心脏收缩期流量在解剖左心室与机械心脏瓣膜植入在主动脉位置。
We develop an overset-curvilinear immersed boundary (overset-CURVIB) method in a general non-inertial frame of reference to simulate a wide range of challenging biological flow problems. The method incorporates overset-curvilinear grids to efficiently handle multi-connected geometries and increase the resolution locally near immersed boundaries. Complex bodies undergoing arbitrarily large deformations may be embedded within the overset-curvilinear background grid and treated as sharp interfaces using the curvilinear immersed boundary (CURVIB) method (Ge and Sotiropoulos, Journal of Computational Physics, 2007). The incompressible flow equations are formulated in a general non-inertial frame of reference to enhance the overall versatility and efficiency of the numerical approach. Efficient search algorithms to identify areas requiring blanking, donor cells, and interpolation coefficients for constructing the boundary conditions at grid interfaces of the overset grid are developed and implemented using efficient parallel computing communication strategies to transfer information among sub-domains. The governing equations are discretized using a second-order accurate finite-volume approach and integrated in time via an efficient fractional-step method. Various strategies for ensuring globally conservative interpolation at grid interfaces suitable for incompressible flow fractional step methods are implemented and evaluated. The method is verified and validated against experimental data, and its capabilities are demonstrated by simulating the flow past multiple aquatic swimmers and the systolic flow in an anatomic left ventricle with a mechanical heart valve implanted in the aortic position.
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影响因子：
4.1
作者：
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通讯作者：
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影响因子：
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作者：
Borazjani, Iman;Sotiropoulos, Fotis
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Sotiropoulos, Fotis
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影响因子：
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通讯作者：
Sotiropoulos, Fotis