Accession Number : ADP004924

Title :   Examples and Significance of Change of Type in Viscoelasticity,

Corporate Author : MINNESOTA UNIV MINNEAPOLIS DEPT OF AEROSPACE ENGINEERING AND MECHANICS

Personal Author(s) : Joseph,D. D. ; Renardy,M. ; Saut,J. C.

Report Date : FEB 1985

Pagination or Media Count : 6

Abstract : Equations governing thee flow of viscoelastic fluids are classified according to the symbol of their differential operators. Conditions for a change of type in steady two-dimensional flows are derived for a three-constant Oldroyd model. The authors find a change of type in the vorticity equation when a critical condition involving speeds and stresses is satisfied. They also sketch how change of type can be discussed for more general models.

Descriptors :   *DIFFERENTIAL EQUATIONS, *VISCOELASTICITY, FLUID FLOW, TWO DIMENSIONAL FLOW, STEADY FLOW, VORTICES

Distribution Statement : APPROVED FOR PUBLIC RELEASE