Accession Number : AD0752962

Title :   Instationaere Grenzschichten an Langsam Bewegten Koerpern in Einer Rotierenden Fluessigkeit (Unstable Boundary Layers on Slowly Moving Bodies in a Rotating Fluid),

Corporate Author : DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V FREIBURG IM BREISGAU (WEST GERMANY)

Personal Author(s) : Djordjevic,Vladan D.

Report Date : 13 APR 1971

Pagination or Media Count : 7

Abstract : Equations are derived which are moving relatively slowly through a rotating fluid. For the case of the impulsive start of the motion from rest, the equations are solved exactly for arbitrary velocities at the outer edge of the boundary layer. The results are applied to the case of the motion of a sphere in the direction of the axis of revolution using Stewartson's velocity at the outer edge. The boundary layer calculated in such a way does not separate from the sphere surface; this makes it possible to calculate the total drag. The formula reduces for the case of non-viscous fluid to the known result given by Stewartson.

Descriptors :   (*CURVED PROFILES, *FLUID DYNAMICS), BOUNDARY LAYER, SURFACE PROPERTIES, EQUATIONS OF MOTION, VELOCITY, FLOW FIELDS, STABILITY, WEST GERMANY

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE