Atmospheric Hydrocodes Using FCT Algorithms.
Abstract
Several recently developed multidimensional hydrocodes for low-altitude nuclear-explosion phenomenology are described and their performance characteristics are discussed. These codes all use flux-corrected transport techniques because of the strong shocks and steep gradients which must be treated during the important early and middle-time phase of single- and multiple-burst low-altitude phenomenology. Three types of codes have been developed: (1) SHAS2D and SHAS3D are simple-geometry cartesian codes for studying microscopic fluid dynamics and turbulence associated with low-altitude explosions; (2) FCT2D is an r-z cylindrical hydrocode with detailed macroscopic physics including realistic atmospheric gradients, complex equations of state, radiation transport and quasi-Lagrangian rezone capabilities; and (3) FCT3D is a three-dimensional x-y-z code designed to carry out complicated multiburst simulations on time scales where radiation transport may be neglected but shocks and steep gradients may not. The structure of all these codes are identical and the FCT modules which carry out the time-step-split integrations are essentially interchangeable. Because of the high degree of modularity extensive optimization has been carried out and will be described.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1975
- Accession Number
- ADA015274
Entities
People
- Jay Paul Boris
- John H. Gardner
- S. Zalesak
Organizations
- United States Naval Research Laboratory