Accession Number:

ADA193891

Title:

Computational Fluid Dynamics Methods for Low Reynolds Number Precessing/Spinning Incompressible Flows

Descriptive Note:

Memorandum rept.

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

• Nusca, Michael J.

Report Date:

1988-04-01

Pagination or Media Count:

31.0

Abstract:

Three dimensional, steady-state, laminar, fully viscous Navier-Stokes simulations were used to predict the behavior of incompressible liquids that were undergoing steady spin and steady precession at a fixed precession angle. These numerical simulations can predict steady viscous and pressure moments. These moments tend to increase the precession angle and reduce the spin rate of the container system. For a completely filled cylinder, liquid-induced roll and side yaw moments were computed as functions of cylinder height to diameter. Keywords Finite difference, Incompressible flow, Liquid-filled projectile, Liquid moment, Low reynolds number, Rotating liquids.

Descriptors:

• *NUMERICAL ANALYSIS
• *SPINNING(MOTION)
• *NAVIER STOKES EQUATIONS
• *REYNOLDS NUMBER
• *INCOMPRESSIBLE FLOW
• *LIQUID FILLED PROJECTILES
• *PRECESSION
• SIMULATION
• ANGLES
• STEADY STATE
• DIAMETERS
• COMPUTATIONS
• YAW
• LIQUIDS
• RATES
• MOMENTS
• FINITE DIFFERENCE THEORY
• CYLINDRICAL BODIES
• PRESSURE
• CONTAINERS
• NUMERICAL METHODS AND PROCEDURES
• FLUID DYNAMICS
• ROTATION
• VISCOUS FLOW
• VISCOSITY
• LOW RATE
• HEIGHT
• FILLING
• INCOMPRESSIBILITY

Subject Categories:

• Guided Missile Launching and Basing Support
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE