CAVEAT: A 3-D ale code based on a Godunov method

Technical Report · Thu Sep 17 00:00:00 EDT 1987

OSTI ID:5460451

Hall, M S

CAVEAT is a three-dimensional Lagrangian computer code that solves the Euler equations of motion for a compressible fluid. Through the option of continuous rezoning, the code can be run in an Eulerian, rezoned Lagrangian, or Lagrangian mode. CAVEAT is thus well-suited to solving problems involving severe distortions and interfacial slip. Velocities and pressures on cell faces are found using a noniterative, approximate Riemann solver developed by J. Dukowicz, and the solution is advanced in time using a Godunov method. This shock capturing technique results in good resolution of strong shocks, which are typically spread over two or three computational cells. The following report contains an overview of some of the major features of the code. A derivation of the approximate Riemann solver is given and we present results obtained for a selection of well-known test problems.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5460451
• Report Number(s): UCID-21220; ON: DE88007000
• Country of Publication: United States
• Language: English

Related Subjects

657002* -- Theoretical & Mathematical Physics-- Classical & Quantum Mechanics
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
ALGORITHMS
C CODES
COMPRESSIBLE FLOW
COMPUTER CODES
DIFFERENTIAL EQUATIONS
EQUATIONS
EQUATIONS OF MOTION
FLUID FLOW
LAGRANGE EQUATIONS
MATHEMATICAL LOGIC
PARTIAL DIFFERENTIAL EQUATIONS
RANKINE-HUGONIOT EQUATIONS
THREE-DIMENSIONAL CALCULATIONS
WAVE PROPAGATION