Three-Dimensional Dynamic Overset Method for Stabilized Finite Elements

摘要

In this paper enhancements to a stabilized finite-element overset scheme are presented. First, the recently proposed grid overlapping method referred to as elliptic hole cutting has been modified to be more suitable for parallel implementation. These modifications dramatically reduce the amount of searching and interpolation required to establish the overset grid network. The second enhancement entails combining the overset approach with an adaptive grid refinement capability. For stabilized finite-elements, the adaptive methodology must ensure that the state-variables remain continuous across element boundaries. Finally, the overset methodology has been extended to three-dimensions with moving domains. Order of accuracy is examined via the method of manufactured solutions for linear and quadratic elements. Overset grid results of a sinusoidally oscillating with and without dynamic hole cutting are compared with single grid. A wing-store separation simulation is carried out to demonstrate the overset capability of current methodology.