Finite macro‐element‐based volume grid deformation for large moving boundary problems

Finite macro-element-based grid deformation has been developed to improve efficiency and robustness of a finite element-based grid deformation. However, conventional stiffness determination based on distance between macro-element and moving boundary is not sufficient for a large moving boundary with a solid deformation included. The Jacobian option that uses element size is applied and a first macro-element layer (FML) is introduced based on the idea of solid-extension mesh moving for a finite macro-element model. Heave, pitch, chord flexure, and span flexure are employed for the verification of grid quality by using some sophisticated measures. Through the verification, the Jacobian option with FML improves the grid quality as compared with the conventional way, and its parameters can be chosen considering the grid quality near the moving boundary and the robustness of overall grid quality. Copyright © 2009 John Wiley & Sons, Ltd.

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