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首页> 外文期刊>Engineering Applications of Computational Fluid Mechanics >Characteristic-Based Split (CBS) Finite Element Method for Incompressible Viscous Flow with Moving Boundaries
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Characteristic-Based Split (CBS) Finite Element Method for Incompressible Viscous Flow with Moving Boundaries

机译：具有移动边界的不可压缩粘性流量的特征的分割（CBS）有限元方法

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AbstractThis paper gives an insight into the existing ALE (arbitrary Lagrangian Eulerian)-CBS (characteristic-based split) method and proposes an alternative CBS scheme for incompressible viscous flow with moving boundaries. First, the existing CBS scheme in ALE framework is reformulated from the Navier-Stokes (NS) equations in Eulerian description, and its advantages and drawbacks are discussed. Then, the classical semi-implicit CBS scheme is combined with the segment spring analogy method, and a new CBS solution procedure in Eulerian framework is developed for moving mesh. By the proposed CBS scheme, the influence of the mesh velocity in the existing ALE-CBS method is circumvented, and the extension of the existing CBS schemes and programs for fixed boundary problems to moving boundary problems seems to be more convenient. Finally, two moving boundary problems, namely the broken dam problem and the flow around an oscillating circular cylinder are presented. Numerical results from the proposed CBS scheme...
机译：摘要本文介绍了现有的ALE（任意拉格朗日欧洲）-CBS（基于特征的分割）方法，并提出了一种具有移动边界的不可压缩粘性流动的替代CBS方案。首先，ALE框​​架中的现有CBS方案由欧拉人描述中的Navier-Stokes（NS）方程来重新讨论其优点和缺点。然后，将经典的半隐式CBS方案与段弹簧类比方法组合，并且开发了Eulerian框架中的新CBS解决方法用于移动网格。通过所提出的CBS方案，对现有ALE-CBS方法中的网格速度的影响是避免的，并且现有的CBS方案和用于移动边界问题的固定边界问题的程序似乎更方便。最后，提出了两个移动边界问题，即破裂的坝问题和摆动圆柱周围的流动。拟议的CBS方案的数值结果......

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