NUCLEAR EXPLOSION INTERACTION STUDIES. VOLUME 2. METHODS FOR ANALYSIS OF THERMAL PHENOMENA
Abstract
Various analytic and numerical methods are described for the phenomena which take place when a high-energy-density source interacts with matter. The interaction usually begins with the transient heating of a solid surface for which analytical methods of study have been developed. The second phase of the interaction process is vaporization. Recent developments in numerical techniques for simulating vaporization are discussed in the context of the two-dimensional interaction code HECTIC. The third phase normally involves the nonsteady flow of ionized vapor, for which equations of state are required. A general numerical technique (EIONX) for evaluating internal energy and pressure for a given temperature and density has been developed and incorporated in the SPUTTER program. For computer programs, e.g., HECTIC, which use internal energy and density as the independent variables, numerical methods were developed to invert the equations of state generated by EIONX. For relatively low energy-density sources, the vapor may be in a molecular phase for a significant part of the interaction process, thus requiring the development of special techniques for evaluating the molecular dissociation energy as a function of temperature and density. The calculations for one particular material--carbon--are discussed in detail.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1967
- Accession Number
- AD0815619
Entities
People
- K. D. Pyatt Jr.
Organizations
- General Dynamics