Accession Number:

AD0773663

Title:

Separation and Reattachment Near Square Protuberances in Low Reynolds Number Couette Flow

Descriptive Note:

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

• Kitchens, Jr, Clarence W.

Report Date:

1974-01-01

Pagination or Media Count:

44.0

Abstract:

Numerical solutions of the steady-state Navier-Stokes equations are obtained which describe flow past a square protuberance immersed in a plane Couette flow. The numerical solutions are illustrated with velocity vector plots, and plots of streamlines and vorticity contours in the flow field for Reynolds numbers between one and 200, based on plate velocity and protuberance height. A small separation bubble is predicted upstream of the protuberance with length and height almost independent of Reynolds number. The downstream separation bubble has a height always less than the protuberance height, but a length which increases almost linearly with Reynolds number reaching more than twenty-five protuberance heights at Re 200. The flow perturbations caused by the protuberance are shown to persist far downstream of the protuberance at Re 100 and 200.

Descriptors:

• *COUETTE FLOW
• *FLOW FIELDS
• ATTACHMENT
• FLOW SEPARATION
• FLUID DYNAMICS
• NAVIER STOKES EQUATIONS
• REYNOLDS NUMBER

Subject Categories:

• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE