Conservative unsteady aerodynamic simulation of arbitrary boundary motion using structured and unstructured meshes in time
Conservative unsteady aerodynamic simulation of arbitrary boundary motion using structured and unstructured meshes in time
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使用结构化和非结构化网格及时进行任意边界运动的保守非定常空气动力学模拟
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Edward D. C. Power
中科院分区：
文献类型：
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作者：
T. Rendall;C. Allen;Edward D. C. Power
由于网格变形的限制，对具有任意边界运动或拓扑变化的非定常流体行为的模拟仍然受到限制，通常需要使用重叠网格、滑动平面、重新网格化或浸入边界的特殊技术。这项工作展示了流体守恒定律的时空解释的应用，该定律在空间和时间上统一了网格。这有效地将网格变形问题替换为网格生成问题，并且由于连通性不再被限制为时间恒定，因此可以模拟任何运动或拓扑变化。给出了活塞、俯仰NACA0012翼型、出现/消失物体、二维库分离和旋转箱体的算例，验证了该方法的有效性。对俯仰翼型的计算结果与传统的动网格非定常计算结果进行了比较，结果是一致的，而示范算例则显示了定性的正确行为，并说明了该技术的一般性质。版权所有©2011 John Wiley&Sons，Ltd.
Simulation of unsteady fluid behaviour with arbitrary boundary motion or topological change remains restricted owing to mesh deformation limitations, and usually requires the application of special techniques using overlapping meshes, sliding planes, remeshing or immersed boundaries. This work presents the application of a spacetime interpretation of the fluid conservation laws that unifies meshes in space and time. This effectively replaces the problem of mesh deformation with the problem of mesh generation and, because connectivity is no longer restricted to being constant in time, any motion or topological change may be simulated. Examples are given applying the method to a piston, a pitching NACA0012 aerofoil, an appearing/disappearing object, a two‐dimensional store separation and a rotation case to validate and then demonstrate the capabilities of the method. Results for the pitching aerofoil case are compared with a conventional moving mesh unsteady computation and shown to be consistent, whereas the demonstration cases show qualitatively correct behaviour and illustrate the general nature of the technique. Copyright © 2011 John Wiley & Sons, Ltd.