Accession Number : AD0684890

Title :   A MODIFIED MOMENT METHOD FOR SHOCK STRUCTURE PROBLEM.

Descriptive Note : Research rept.,

Corporate Author : POLYTECHNIC INST OF BROOKLYN FARMINGDALE N Y DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS

Personal Author(s) : Khosla,Prem K.

Report Date : FEB 1969

Pagination or Media Count : 22

Abstract : The structure of a shock wave in a monatomic gas has been the subject of investigation by many authors. In this problem there are two relevant mean free paths, viz., the length over which upstream distribution is altered by collisions and another length over which downstream particle distribution is changed through collisions. Appropriate distribution functions over these length scales are postulated and a moment method to solve the Boltzmann equation is described to solve the shock wave structure problem. For strong shocks the results agree with those of Mott-Smith's theory while for weak shocks, the results are in agreement with Navier-Stokes and other approximate solutions. (Author)

Descriptors :   (*SHOCK WAVES, GASES), GAS FLOW, APPROXIMATION(MATHEMATICS), STATISTICAL MECHANICS, DISTRIBUTION FUNCTIONS, SHOCK(MECHANICS)

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE