Accession Number:

ADA048749

Title:

Transient Free-Surface Hydrodynamics.

Descriptive Note:

Interim rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

• Fritts,M. J.

Report Date:

1977-11-01

Pagination or Media Count:

38.0

Abstract:

The control volume approach is used to obtain a finite-difference scheme for a Lagrangian formulation of inviscid incompressible flow using an irregular triangular mesh. The method permits grid reconnections and allows local vertex addition and deletion. Algorithms are presented which conserve divergence vorticity, mass, momentum and energy even during grid restructuring. Examples are taken from simulations of shear flow and flow over a hydrofoil in which the restructuring algorithms are crucial. Although the structure of the code is highly scalar, techniques are outlined for producing efficient code even for the new vector computers. Author

Descriptors:

• *ALGORITHMS
• *HYDRODYNAMICS
• *LAGRANGIAN FUNCTIONS
• COMPUTER PROGRAMS
• TRANSIENTS
• GRIDS
• EFFICIENCY
• FINITE DIFFERENCE THEORY
• NUMERICAL METHODS AND PROCEDURES
• INVISCID FLOW
• INCOMPRESSIBLE FLOW
• POISSON EQUATION
• HYDROFOILS
• TRIANGLES

Subject Categories:

• Theoretical Mathematics
• Computer Programming and Software
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE