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Developing a robust ordering-based unstructured moving grid strategy

Fouladi, N ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.2514/6.2007-1460
  3. Publisher: American Institute of Aeronautics and Astronautics Inc , 2007
  4. Abstract:
  5. In this work, a new method is presented to control the propagation of the boundary deformation within an unstructured mesh domain effectively and to avoid inefficient and unnecessary grid movement computations. In this regard, a new and simple automatic unstructured mesh ordering strategy is developed. The mesh movement algorithm automatically determines the regions, which are affected by the displacement propagation. The method needs little memory storage benefiting from an improved mesh data structure. We also present an improved acceleration strategy, which is highly consistent with the modified connectivity matrix and is able to handle a wide variety of problems with small and large boundary and grid deformations without requiring considerable memory storage. Using successive small deformation strategy and a combination of spring analogy and its torsional aspect, it leads to a robust strategy, which guarantees a qualitative mesh even in large and severe boundary and grid deformations. The current movement algorithm suitably employs the modified connectivity matrix to propagate deformation even to regions far from the moving boundary and provides a higher flexibility to control the displacement directions in problems with a wide variety of deformation magnitudes and directions. The extended method can be equally utilized in different industrial applications such as those in fluid-structure interactions and stochastic shape optimizations
  6. Keywords:
  7. Algorithms ; Deformation ; Industrial applications ; Optimization ; Problem solving ; Robust control ; Stochastic control systems ; Displacement propagation ; Mesh data structures ; Stochastic shape optimizations ; Boundary layers
  8. Source: 45th AIAA Aerospace Sciences Meeting 2007, Reno, NV, 8 January 2007 through 11 January 2007 ; Volume 24 , 2007 , Pages 17172-17184 ; 1563478900 (ISBN); 9781563478901 (ISBN)
  9. URL: https://arc.aiaa.org/doi/abs/10.2514/6.2007-1460