Accession Number : ADA335576

Title :   Displacement of the Earth's Bow Shock and Magnetopause Due to an Impinging Interplanetary Shock Wave

Descriptive Note : Master's thesis

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH

Personal Author(s) : Olson, William A.

PDF Url : ADA335576

Report Date : DEC 1997

Pagination or Media Count : 93

Abstract : Interplanetary shock waves (ISWs) propagating through the solar wind can collide with the earth's bow shock, resulting in a series of new shocks, contact discontinuities, and rarefaction waves which interact to effectively move the bow shock and magnetopause toward the earth. A one dimensional MacCormack predictor corrector algorithm with Flux Corrected Transport (FCT) was developed to model the ISW bow shock and magnetopause interactions, and to numerically predict their propagation speeds after collision. Analytic relationships for the Mach numbers and propagation speeds of the generated shock waves and contact discontinuities were used to validate the model and to compare numerical results. In both the gas dynamic and magnetohydrodynamic (MHD) fluid approximations the model predicted propagation speeds of the moving bow shock to within five percent of analytical solutions. Propagation speeds of the moving magnetopause were also determined to within five percent.

Descriptors :   *SHOCK WAVES, *BOW SHOCK, *MAGNETOSPHERE, ALGORITHMS, SPACE ENVIRONMENTS, THESES, ELECTRIC FIELDS, GAS DYNAMICS, APPROXIMATION(MATHEMATICS), MACH NUMBER, WAVEFRONTS, MAGNETOHYDRODYNAMICS, SOLAR WIND.

Subject Categories : Astrophysics
      Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE