Accession Number:

ADA210495

Title:

Two Counter-Rotating Vortices Approaching a Free Surface in a Viscous Fluid

Descriptive Note:

Final rept.

Corporate Author:

DAVID TAYLOR RESEARCH CENTER BETHESDA MD

Personal Author(s):

• Ohring, Samuel
• Lugt, Hans J.

Report Date:

1989-06-01

Pagination or Media Count:

64.0

Abstract:

Numerical computations have been performed to investigate the interaction of two counter-rotating vortices with a free surface in a viscous, incompressible fluid where the motion is considered two-dimensional and laminar. The decaying vortices deform the free surface during their approach and they can display the phenomenon of rebounding. The numerical scheme is based on the Navier-Stokes equations and uses boundary-fitted coordinates to accommodate the locally high vorticity of the moving vortices and the nonlinear deformation of the free surface. Vortices Free-surface interaction Two dimensional flow Surface signature Viscous incompressible flow Boundary value problems.

Descriptors:

• *VORTICES
• *INCOMPRESSIBLE FLOW
• *VISCOUS FLOW
• NUMERICAL ANALYSIS
• MOTION
• SURFACES
• BOUNDARY VALUE PROBLEMS
• SIGNATURES
• FLUIDS
• NONLINEAR ANALYSIS
• TWO DIMENSIONAL FLOW
• NAVIER STOKES EQUATIONS
• VISCOSITY
• LAMINAR FLOW
• INCOMPRESSIBILITY
• DEFORMATION
• COUNTERROTATION
• COMPUTATIONS
• INTERACTIONS

Subject Categories:

• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE