An upwind approach to unsteady flowfield simulationA numerical method to determine unsteady solutions of the laminar, perfect gas Navier-Stokes equations has been developed. The structured finite-volume, approximately factored implicit scheme uses Newton subiterations to obtain the spatially and temporally second-order accurate time history of the interaction of blast-waves with stationary targets. The inviscid flux is evaluated using either of two upwind techniques, while the viscous terms are computed by central differencing. Comparisons of numerical, analytical, and experimental results are made in two and three dimensions. The results show accurate wave speed resolution and nonoscillatory discontinuity capturing.
Document ID
19900058857
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Atwood, Christopher A. (NASA Ames Research Center Moffett Field, CA, United States)