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1. NAME OR DESIGNATION OF PROGRAM - NASA-VOF3D.
2. COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE -
To request or retrieve programs click on the one of the active versions below. A password and special authorization is required.
Explanation of the status codes.
Program-name Package-ID Status
NASA-VOF3D NESC9568/01 Tested
Machines used:
Package-ID Orig.Computer Test Computer
NESC9568/01 CRAY 1 DEC VAX 8810
3. DESCRIPTION OF PROGRAM OR FUNCTION - NASA-VOF3D is a three- dimensional, transient, free surface, incompressible fluid dynamics program. It is specifically designed to calculate confined flows in a low gravity environment in which surface physics must be accurately treated. It allows multiple free surfaces with surface tension and wall adhesion and includes a partial cell treatment that allows curved boundaries and internal obstacles. Variable mesh spacing is permitted in all three coordinate directions. Boundary conditions available are rigid free-slip wall, rigid no-slip, wall, continuative, periodic, and specified pressure outflow boundary.
4. METHOD OF SOLUTION - NASA-VOF3D simulates incompressible flows with free surfaces using the volume-of-fluid (VOF) algorithm. This technique is based on the use of donor-acceptor differencing to track the free surface across an Eulerian grid. The free surfaces are treated by introducing a function defined to be unity at any point occupied by the fluid and zero elsewhere. The complete Navier- Stokes equations for an incompressible fluid are solved by finite differences with surface tension effects included. Wall adhesion may be included or neglected as a user option. The pressures (and velocities) are advanced in time throughout the computing mesh by either a conjugate residual method or the successive overrelaxation (SOR) method. The conjugate residual method is vectorized for the Cray and uses a scaled coefficient matrix.
5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - NASA-VOF3D is restricted to cylindrical coordinate representation of the geometry. A three-dimensional wall-adhesion procedure is available only for straight-walled containers.
6. TYPICAL RUNNING TIME -
7. UNUSUAL FEATURES OF THE PROGRAM - NASA-VOF3D is highly structured so that individual components may be easily modified to fit specific problem requirements or to accept subsequent code upgrades.
8. RELATED AND AUXILIARY PROGRAMS - NASA-VOF3D is a three-dimensional successor to NASA-VOF2D (NESC 9644); however, its origin and architecture are most directly related to SOLA-3D.
9. STATUS
NESC9568/01: 12-FEB-1992 Tested at NEADB
10. REFERENCES -
- Martin D. Torrey et al:
NASA-VOF2D - A Computer Program for Incompressible Flows with Free Surfaces
LA-10612-MS (December 1985).
- B. Nichols, C.W. Hirt, and R.S. Hotchkiss:
SOLA-VOF - A Solution Algorithm for Transient Fluid Flow with
Multiple Free Boundaries
LA-8355 (August 1980).
NESC9568/01:
- Martin D. Torrey, Raymond C. Mjolsness, Leland R. Stein:
NASA-VOF3D - A Three-Dimensional Computer Porgram for
Incompressible Flows with Free Surfaces
LA-11009-MS UC-32 (issued July 1987).
- M. Birgersson:
NASA-VOF3D Tape Description and Implementation Information
NESC Note 88-25 (December 7, 1987).
11. MACHINE REQUIREMENTS - 4 units in addition to the standard input/output units.
12. PROGRAMMING LANGUAGE(S) USED -
NESC9568/01: FORTRAN
13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED -
14. OTHER PROGRAMMING OR OPERATING INformATION OR RESTRICTIONS -
NASA-VOF3D contains calls to several environment-dependent routines, including graphics systems. These routines are not included, and users must substitute the appropriate routines for their computing environment. While many problems can be run using NASA-VOF3D without code modification, specific applications may require logic changes which can be accomplished by using the UPDATE utility.
15. NAME AND ESTABLISHMENT OF AUTHORS -
M.D. Torrey
Los Alamos National Laboratory
16. MATERIAL AVAILABLE -
NESC9568/01:
NESC9568_01.001 This information file 51 records
NESC9568_01.002 JCL and control information 5 records
NESC9568_01.003 NASA-VOF3D UPDATE format source 7647 records
NESC9568_01.004 NASA-VOF3D source updates for sample problem 61 records
NESC9568_01.005 NASA-VOF3D FORTRAN source (VAX version) 12251 records
NESC9568_01.006 NASA-VOF3D dummy graphics routines 92 records
NESC9568_01.007 NASA-VOF3D auxiliary SLATEC routines 317 records
NESC9568_01.008 Sample problem input 32 records
NESC9568_01.009 Sample problem output 4667 records
17. CATEGORIES -
- H. Heat Transfer and Fluid Flow
Keywords: Navier-Stokes equation, finite difference method, fluid flow, incompressible flow, three-dimensional
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