Accession Number : ADA257950


Title :   Self-Similar Fluid Dynamic Limits for the Broadwell System


Descriptive Note : Technical rept.


Corporate Author : WISCONSIN UNIV-MADISON CENTER FOR MATHEMATICAL SCIENCES


Personal Author(s) : Slemrod, Marshall ; Tzavaras, Athanasios E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a257950.pdf


Report Date : Oct 1992


Pagination or Media Count : 60


Abstract : This report discusses a new approach for the resolution of the fluid dynamic limit for the Broadwell system of the kinetic theory of gases, appropriate in the case of Riemann, Maxwellian data. Since the formal limiting system is expected to have self-similar solutions, we are motivated to replace the Knudsen number E in the Broadwell model so that the resulting model admits self-similar solutions in E = x/t and then let E go to zero. The limiting, procedure is justified and the resulting limit is a solution of the Riemann problem for the fluid dynamic limit equations. A class of Riemann data for which this program can be carried out is exhibited. Furthermore it is shown that for the Carleman model the complete program can be done successfully for arbitrary Riemann data.


Descriptors :   *GAS DYNAMICS , *PARTIAL DIFFERENTIAL EQUATIONS , *GAS FLOW , *KINETIC THEORY , MODELS , FLUIDS , APPROACH , KNUDSEN NUMBER , EQUATIONS , NUMBERS , KINETICS , DYNAMICS , RESOLUTION


Subject Categories : Numerical Mathematics
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE