Accession Number:

ADA026531

Title:

A Least Squares Finite Element Approach to Unsteady Gas Dynamics.

Descriptive Note:

Final rept.,

Corporate Author:

BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s):

• Polk,John F.

Report Date:

1976-05-01

Pagination or Media Count:

68.0

Abstract:

A new numerical technique for solving unsteady gas dynamic equations is presented. The technique is based on least squares finite element concepts with elements that are constructed in both space and time. Both linear and quadratic interpolation is used on individual elements. The technique is tested against a problem whose exact solution is known so that numerical accuracy can be ascertained.

Descriptors:

• *FINITE ELEMENT ANALYSIS
• *GAS DYNAMICS
• VELOCITY
• PISTONS
• PROBLEM SOLVING
• CYLINDRICAL BODIES
• LEAST SQUARES METHOD
• PARTIAL DIFFERENTIAL EQUATIONS
• NUMERICAL METHODS AND PROCEDURES
• NONUNIFORM FLOW

Subject Categories:

• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE