Adaptive Mesh Controller for Computational Analysis

"Numerical simulation of store separation from weapons bays or wing pylons is made difficult by the need to move the computational mesh and provide adequate resolution of flow structures that are changing with time. The Phase I achievements demonstratethat an adaptive grid, which is coarsened and/or refined to accommodate the motion of the store, is a viable approach for performing realistic separation scenarios. This recent effort demonstrated the practicality of the approach and identified theelements required for further maturation of an adaptive mesh controller, CRISP CFD, in Phase II. The challenge of maintaining accurate surface definition as the mesh is refined or deformed will be addressed. Generalized solution error estimates willreplace gradient-based criterion. Elements of transient solution adaptation, such as moving flow features and high order solution transfer, will receive attention. A parallel implementation and dynamic load re-balancing will provide the necessaryautomation, eliminating the current "man-in-the loop" procedure. These investigations will demonstrate the potential effectiveness of CRISP CFD in a variety of disciplines, including weapons dispense. While the proposed program focuses on storeseparation applications, the resulting mesh adaptation toolkit will be invaluable in any computational analysis in which an unstructured mesh is employed."