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),

Descriptive Note:

Corporate Author:

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

Personal Author(s):

Report Date:

1971-04-13

Pagination or Media Count:

7.0

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 Stewartsons 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.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE