Accuracy Assessment Methodology for a High-Order Unstructured Finite Volume Solver

摘要

A careful assessment of accuracy is made for high-order solution of smooth compressible flows using a high-order Newton-Krylov unstructured mesh solver. A straightforward methodology is proposed for accuracy assessment of the high-order unstructured approach, based on total pressure loss, drag measurement, and solution error calculation. The issue of mesh refinement in accuracy measurement for unstructured meshes is analyzed thoroughly. Solutions of different orders of accuracy are compared in detail through several investigations. The possibility of reducing computational cost required for a given level of solution accuracy using high-order discretization is demonstrated.