Efficient Computational Tool for Comprehensive Thermal Analysis of Military Ground Vehicles
Small Business Information
CFD Research Corporation
215 Wynn Dr., 5th Floor, Huntsville, AL, 35805
AbstractIncluding radiative heat transfer in full-vehicle thermal analysis simulations results in nonlinear equations with coefficient matrices that are dense, poorly conditioned, and difficult to solve. Further, calculating and storing view factors¯needed for surface-to-surface radiative fluxes¯is computationally prohibitive on fine grids. In the proposed SBIR project, CFDRC will develop, validate and demonstrate an efficient, high-fidelity computational tool for full-vehicle thermal analysis. The overall innovation (Phase I and II) consists of four main aspects: (1) Develop a robust, efficient and highly linear system solver by coupling a Krylov sub-space solver and algebraic multigrid (AMG) preconditioner (2) Investigate influence of linear system implicitness level on the CPU requirements, (3) Develop computationally efficient view-factor and ray tracing calculation algorithms, and (4) Implement a comprehensive thermal model including the radiation solver coupled with a thin shell conduction model. In Phase I, feasibility will be demonstrated by: (1) Determining the optimal combination of solver and preconditioner parameters, (2) Incorporating a thin shell conduction model in an existing radiation code, and (3) Demonstrating the thermal analysis model on a realistic vehicle geometry. In Phase II, we will develop efficient algorithms for view factor and infrared ray tracing calculations. The comprehensive thermal model will be incorporated into a code of interest to the Army, and applied to 3-D thermal analysis of a military ground vehicle.
* information listed above is at the time of submission.