Accession Number : ADA290481

Title :   Three Problems in Fluid Dynamics.

Descriptive Note : Rept. for 15 Jun 91-14 Jun 94,

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

Personal Author(s) : Joseph, Daniel D.

PDF Url : ADA290481

Report Date : 10 NOV 1994

Pagination or Media Count : 7

Abstract : Three problems were proposed for study. The first was to determine the fluid dynamics of spin-up of two fluids in a rotating container. The applications of these studies are the the problem of stabilization of rotating liquid-filled artillery shells in free flight and to the determination of the rheological properties of blends of polymers used to fabricate plastic composites with improved material properties. The second problem is to study the motion of solid particles in a flowing viscous fluid by direct numerical simulation of the Navier-Stokes equations and the particles equations of motion. The third problem was to identify correct physical mechanisms to regularize ill-posed problems which arise in the study of two-phase flows of bubbly mixture in spinoidal regions of phase change mixtures of vapour bubbles in liquids.

Descriptors :   *RHEOLOGY, *FLUID DYNAMICS, *VISCOUS FLOW, *TWO PHASE FLOW, MATHEMATICAL MODELS, EQUATIONS OF MOTION, PHASE TRANSFORMATIONS, PHYSICAL PROPERTIES, POLYMERS, COMPOSITE MATERIALS, NUMERICAL ANALYSIS, MIXTURES, BUBBLES, CONTAINERS, PARTICULATES, SPINNING(MOTION), NAVIER STOKES EQUATIONS, ROTATION, PLASTICS, NONNEWTONIAN FLUIDS, FREE FLIGHT.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE