Accession Number:

AD0743489

Title:

Generation and Propagation of Vorticity under the Perfect-Slip Condition

Descriptive Note:

Corporate Author:

DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD COMPUTATION MATHEMATICS/LOGISTICS DEPT

Personal Author(s):

• Lugt, Hans J.

Report Date:

1972-02-01

Pagination or Media Count:

27.0

Abstract:

Renewed interest in slip flow within the realm of continuum physics has resulted in a numerical study on generation and propagation of vorticity in a flow past thin elliptic cylinders under the perfect-slip condition. Computer results show that surface vorticity is more concentrated at the edges for perfect slip than for nonslip, due to the surface curvature. Flow separation, instability, and vortex shedding occur also under the perfect-slip condition. Although drag is drastically reduced for slender body configurations, drag coefficients for a plate normal to the flow are almost the same for nonslip and perfect slip, at least for Reynolds number 10. All computations were carried out for Reynolds numbers below 200.

Descriptors:

• *SHIP HULLS
• VORTICES
• FLUID DYNAMICS
• DRAG
• NAVIER STOKES EQUATIONS
• VISCOSITY
• FLOW SEPARATION

Subject Categories:

• Marine Engineering
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE