Paul R. Woodward

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Results of an extensive comparison of numerical methods for simulating hydrodynamics are presented and discussed. This study focuses on the simulation of fluid flows with strong shocks in two dimensions. By “strong shocks,” we here refer to shocks in which there is substantial entropy production. For the case of shocks in air, we therefore refer to Mach(More)
Understanding turbulence and mix in compressible flows is of fundamental importance to real-world applications such as chemical combustion and supernova evolution. The ability to run in three dimensions and at very high resolution is required for the simulation to accurately represent the interaction of the various length scales, and consequently, the(More)
Three-dimensional high-resolution simulations (up to 8 billion zones) have been performed for a Richtmyer-Meshkov instability produced by passing a shock through a contact discontinuity with a two-scale initial perturbation. The setup approximates shock tube experiments with a membrane pushed through a wire mesh. The simulation produces mixing-layer widths(More)
Massively parallel processors (MPPs) hold the promise of extremely high performance that, if realized, could be used to study problems of unprecedented size and complexity. One of the primary stumbling blocks to this promise has been the lack of tools to translate application codes to MPP form. In this paper we show how applications codes written in a(More)
Examples of scientific visualization techniques used for the interactive exploration of very large data sets from supercomputer simulations of fluid flow are presented. Interactive rendering of images from simulations of grids of 2 million or more computational zones are required to drive high-end graphics workstations to their limits with 2-D data. The(More)
The evolution of the first generations of stars at zero or extremly low metallicity, and especially some crucial properties like the primary 14N production, is charactarized by convective-reactive mixing events that are mostly absent from similar evolution phases at solar-like metallicity. These episodes occur when unprocessed H-rich material is mixed(More)