Accession Number : AD0636501

Title :   FLOW IN A PRECESSING SPHERICAL ENCLOSURE. II. LOW VISCOSITY.

Corporate Author : CALIFORNIA INST OF TECH PASADENA DIV OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s) : Venezian, Guilio

Report Date : JUN 1966

Pagination or Media Count : 48

Abstract : The flow of an incompressible fluid of low viscosity within a precessing spherical enclosure is treated in the linear approximation which requires a small precessional speed or a small angle between the precession and rotation vectors. An approximate solution to the problem is obtained by matching a boundary layer flow to a suitable interior flow. Two flow regimes exist, depending on whether the precession is fast or slow. This latter case presents some interesting phenomena, associated with a breakdown in the boundary layer equations and the change from an elliptic to a hyperbolic system of equations that describe the interior flow. The Bondi-Lyttleton problem of flow within a spherical enclosure that is precessing at an extremely low rate is discussed in detail. (Author)

Descriptors :   (*FLUID FLOW, SPHERES), VISCOSITY, INCOMPRESSIBLE FLOW, APPROXIMATION(MATHEMATICS), PARTIAL DIFFERENTIAL EQUATIONS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE