Computer Programs
NESC9644 NASA-VOF2D.
last modified: 04-FEB-1988 | catalog | categories | new | search |

NESC9644 NASA-VOF2D.

NASA-VOF2D, 2-D Transient Free Surface Incompressible Fluid Dynamic

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1. NAME OR DESIGNATION OF PROGRAM:  NASA-VOF2D.
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2. COMPUTERS
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Program name Package id Status Status date
NASA-VOF2D NESC9644/01 Tested 04-FEB-1988

Machines used:

Package ID Orig. computer Test computer
NESC9644/01 CRAY 1 CRAY X-MP
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3. DESCRIPTION OF PROGRAM OR FUNCTION

NASA-VOF2D is a two- dimensional, transient, free surface incompressible fluid dynamics program. It allows multiple free surfaces with surface tension and wall adhesion forces and has a partial cell treatment which allows curved boundaries and interior obstacles.
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4. METHOD OF SOLUTION

NASA-VOF2D 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 complete Navier-Stokes equations in primitive variables for an incompressible fluid are solved by finite differences with surface tension and wall adhesion included. Optionally the pressure equation can be solved by a conjugate residual method rather than the successive overrelaxation (SOR) method.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME:
NESC9644/01
The test case included in this package has been executed by the NEA Data Bank on a CRAY-XMP/2000 SERIAL-113 computer in 2 seconds of CPU time.
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7. UNUSUAL FEATURES OF THE PROGRAM

NASA-VOF2D is highly structured so that individual components may be easily modified to fit specific problem requirements or to accept subsequent code upgrades.
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8. RELATED AND AUXILIARY PROGRAMS

The numerical method used in NASA-VOF2D is an extension of the method used in SOLA-VOF (NESC 948) and NASA SOLA-VOF.
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9. STATUS
Package ID Status date Status
NESC9644/01 04-FEB-1988 Tested at NEADB
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10. REFERENCES

- NASA-VOF2D, NESC No. 9644, NASA-VOF2D Tape Description and
  Implementation Information,
  National Energy Software Center Note 86-71, July 6, 1986.
- 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.
- R.S. Hotchkiss
Simulation of Tank Draining Phenomena with the NASA SOLA-VOF Code,    LA-8163-MS, December 1979.
NESC9644/01, included references:
- M.D. Torrey, L.D. Cloutman, R.C. Mjolsness and C.W. Hirt:
  NASA-VOF2D: A Computer Program for Incompressible Flows
  with Free Surfaces.
  LA-10612-MS  (December 1985)
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11. MACHINE REQUIREMENTS:  3 units in addition to the standard input/output units.
NESC9644/01
Execution of the test case on a CRAY-XMP/2000 computer  required 143,872 words of main storage.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC9644/01 FORTRAN
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
NESC9644/01
COS 1.15 with compiler CFT 1.14 (CRAY-XMP/2000).
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

NASA-VOF2D contains calls to several system-dependent plotting routines and a time limit routine. These are not included, and users must supply their own equivalent routines. NASA-VOF2D can run many problems without modification, but a specific application may require changes to the logic for special inflow or outflow ports, complicated geometries, or unusual conditions. These are accomplished by using the UPDATE utility.
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15. NAME AND ESTABLISHMENT OF AUTHORS

           M.D. Torrey
           Los Alamos National Laboratory
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16. MATERIAL AVAILABLE
NESC9644/01
File name File description Records
NESC9644_01.001 Information file 56
NESC9644_01.002 JCL and control information 23
NESC9644_01.003 NASA-VOF2D UPDATE source 3743
NESC9644_01.004 NASA-VOF2D source updates 41
NESC9644_01.005 NASA-VOF2D dummy routines 43
NESC9644_01.006 NASA-VOF2D Sample problem input 18
NESC9644_01.007 NASA-VOF2D Sample problem output 1550
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17. CATEGORIES
  • H. Heat Transfer and Fluid Flow

Keywords: Navier-Stokes equation, finite difference method, fluid flow, incompressible flow, two-dimensional.