Accession Number : ADA323205

Title :   Continuum State Calculations in Atmospheric Physics.

Corporate Author : FLORIDA AGRICULTURAL AND MECHANICAL UNIV TALLAHASSEE

Personal Author(s) : Weatherford, Charles

PDF Url : ADA323205

Report Date : 28 MAR 1997

Pagination or Media Count : 7

Abstract : The present project has as its objective the calculation of scattering cross sections for constituents of the Earth's atmosphere - this includes electron molecule, atom-atom atom-ion, and atom molecule collisions. A computational technology is being developed which makes efficient use of massively parallel computers. In doing so, some of the techniques of computational fluid dynamics are being adapted to molecular physics and quantum chemistry. These calculations will open the way to large scale modeling of the Earth's atmospheric energy exchange processes which are important for weather prediction. In addition, the same techniques, with different emphasis, are applicable to the study of electronic aging of materials, particularly cubane derivatives (a high explosive), and for combustion and propulsion studies. A finite element scattering code is being developed which is to be run on the CRAY T3D parallel computer. It features a 'hyper-ray' technique wherein the calculation may be partitioned into completely independent pieces which may be executed on different processors simultaneously, with no interprocessor communication required. Then a variational linear combination of the pieces is constructed so as to provide a complete solution to the problem.

Descriptors :   *SCATTERING CROSS SECTIONS, *ENERGY TRANSFER, *ATMOSPHERIC PHYSICS, QUANTUM CHEMISTRY, FINITE ELEMENT ANALYSIS, PARALLEL PROCESSING, COMPUTATIONAL FLUID DYNAMICS, WEATHER FORECASTING, MOLECULE MOLECULE INTERACTIONS, ION MOLECULE INTERACTIONS.

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE