High Efficiency Computation of High Reynolds Number Flows

Although advancements in CFD technology and high performance computing have proven to be effective in assessing the hydrodynamic performance of naval vessels, the effort required to develop analysis models remains challenging and time-consuming. Decomposing and manipulating design geometry for mesh construction, while capturing flow characteristics and interactions among moving components, are manual processes and place the heaviest demands on time in the analysis process. An integrated modeling and hydrodynamic analysis framework is proposed. It will incorporate a feature-based environment facilitating rapid layout and configuration of hydrodynamic analysis models automating creation and parameterization of structured block grids and overset assemblies. The generation of the complete analysis model and the launching, tracking, and steering of solutions will be incorporated. Refinement and alignment of grids in critical flow regions (streamlines, wakes, vortices, boundary layers) and management of overset grids around moving components will be supported. Distributed-object computing algorithms to create, process, and manage large models and simulations will be supported. The framework seamlessly links CFD solvers with the gridding and overset assembly process, enabling rapid development of computationally efficient and accurate simulations for performance assessment of submarines at earlier stages of the engineering process. It significantly improves the productivity of US Navy hydrodynamics analysts.