A Numerical Approach for Modelling Cavitating Flows [Book Chapter]

Conference · Tue Dec 31 04:00:00 EST 1991 · Fluid Flow

DOI:https://doi.org/10.1515/9783110871906-013· OSTI ID:5715476

Ingber, M. S. ^[1]; Hailey, C. E. ^[2]

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1. Univ. of New Mexico, Albuquerque, NM (United States)
2. Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

The flow about a submerged partially- or supercavitating axisymmetric body is considered in this paper both at zero and non-zero angle of attack. The direct boundary element method is used to solve for the potential flow field and to determine the cavity shape. This is accomplished by performing a Newton-Raphson iteration in which the cavity shape is perturbed in an effort to satisfy the nonlinear dynamic boundary condition along the surface of the cavity. For problems with non-zero angle of attack, the flow field is three-dimensional and the cavity is not symmetric. In these cases, the convergence of the Newton-Raphson iteration is sensitive to the initial estimate of the cavity shape. Methods of generating these initial estimates are discussed which have been successful in leading to convergent solutions. Also efficient methods of parameterizing the cavity are developed to reduce the computational effort.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5715476
• Report Number(s): SAND--90-2418C; CONF-910863--1; ON: DE91009178; ISBN: 9783110131727
• Conference Information: Journal Name: Fluid Flow Journal Volume: 1
• Country of Publication: United States
• Language: English

Related Subjects

640410* -- Fluid Physics-- General Fluid Dynamics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ASYMMETRY
BOUNDARY LAYERS
CAVITATION
CONES
CONVERGENCE
CYLINDERS
DIFFERENTIAL EQUATIONS
EQUATIONS
FLOW MODELS
FLUID FLOW
FLUID MECHANICS
HYDRODYNAMICS
ITERATIVE METHODS
LAMINAR FLOW
LAPLACE EQUATION
LAPLACIAN
LAYERS
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
MECHANICS
NEWTON METHOD
NONLINEAR PROBLEMS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
THREE-DIMENSIONAL CALCULATIONS