NASTRAN Implementation for Free Surface Flow Problems.

reportActive / Technical Report | Accession Number: ADA057260 | Open PDF

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 Laplaces 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

Author(s):
Zarda, P. Richard ; Marcus, Melvyn S.
Author Organization(s):
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD
Descriptive Note:
Research and development rept.,
Supplementary Note:
Presented at NASTRAN Users' Colloquium (6th) 4-6 Oct 77, Cleveland, OH.
Pagination:
0034

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
DTNSRDC-78/065
Task Number(s):
Z0140201, SR0140301
Project Number(s):
Z01402, SR01403
 Subject Terms
Joint Capability Areas:
JCA_4_Logistics; JCA_1_Force Support; JCA_5_Command and Control; JCA_5.3_Planning
Modernization Areas:
Quantum Science and Computing
Communities of Interest:
Ground and Sea Platforms
Descriptor(s):
*FLOW FIELDS, *SURFACE PROPERTIES, INTERACTIONS, FINITE ELEMENT ANALYSIS, SOLIDS, SOLUTIONS(GENERAL), BOUNDARY VALUE PROBLEMS, ASYMPTOTIC SERIES, FLUID FLOW, POTENTIAL THEORY
Field(s)/Group(s):
Fluid Mechanics
Keyword(s):
NASTRAN computer program, WU11844109, PE61152N
Report Date:
1978 Aug 01