NASTRAN Implementation for Free Surface Flow Problems.

Abstract

This paper presents a procedure for using NASTRAN to determine the flow field about arbitrarily shaped bodies in the presence of a free surface. The fundamental unknown of the problem is the velocity potential which must satisfy Laplace's equation in the fluid region. Boundary conditions on the free surface may involve second order derivatives in space and time. In cases involving infinite domains either a tractable radiation condition is applied at a truncated boundary or a series expansion is used and matched to the local finite elements. Solutions are presented for harmonic, transient, and steady state problems and compared to either exact solutions or other numerical solutions. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1978
Accession Number
ADA057260

Entities

People

  • Melvyn S. Marcus
  • P. Richard Zarda

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Computer Programs
  • Computers
  • Diffraction
  • Equations
  • Equations Of Motion
  • Finite Element Analysis
  • Flow Fields
  • Fluid Flow
  • Fluid Mechanics
  • Geometry
  • Hydrodynamics
  • Laser-Induced Breakdown Spectroscopy
  • Pressure Distribution
  • Three Dimensional
  • Two Dimensional
  • Waves

Fields of Study

  • Mathematics

Readers

  • Approximation Theory.
  • Operations Research
  • Plasma Physics / Magnetohydrodynamics

Technology Areas

  • Space
  • Space - Hall-Effect Thruster