Accession Number : ADA256056


Title :   Opacity, Equation of State, and Radiation Transport Model for Moderate Density, eV-Temperature Plasmas


Descriptive Note : Interim rept.


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC


Personal Author(s) : Apruzese, John P ; Giuliani, Jr , John L ; Kepple, Paul C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a256056.pdf


Report Date : 22 Sep 1992


Pagination or Media Count : 19


Abstract : We present a model suitable for calculating opacity and radiation transport in eV-temperature plasmas such as those encountered in electromagnetic launchers, arcjets, and some types of plasma processing. Using a detailed multilevel, atomic model, the opacity at about 1400 frequency points is calculated for a grid of temperature and electron densities using either the LTE or CRE approximation. This detailed grid is further simplified to 15-20 energy bins within each of which the Planck mean opacity is calculated and stored for use by a radiation transport code. This radiation transport model is a quasi- two-dimensional ray trace at each of these bins suitable for rapid calculation of approximate radiative cooling (heating) for use in conjunction with a hydrodynamics model. Radiation transport, Electromagnetic launchers, Planck mean opacity, Local thermodynamic equilibrium.


Descriptors :   *PLASMAS(PHYSICS) , *ELECTRON TRANSPORT , *OPACITY , MATHEMATICAL MODELS , RADIATION , ENERGY , RADIATIVE TRANSFER , COOLING , HEATING , RAY TRACING , HYDRODYNAMICS , MEAN , ELECTRONS , EQUILIBRIUM(GENERAL) , GRIDS , TEMPERATURE , THERMODYNAMICS , TWO DIMENSIONAL


Subject Categories : Plasma Physics and Magnetohydrodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE