NESC0268 TRANS-FUGUE-1.

TRANS-FUGUE-1, Single Channel 2 Phase Flow Heat Transfer after Boiling

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, FEATURES, AUXILIARIES, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: TRANS-FUGUE-1.

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Rules for end-users are available here.

Program name	Package id	Status	Status date
TRANS-FUGUE-1	NESC0268/01	Tested	01-SEP-1968

Machines used:

Package ID	Orig. computer	Test computer
NESC0268/01	IBM 7090	IBM 7090

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3. NATURE OF PHYSICAL PROBLEM SOLVED

TRANS-FUGUE1 is a transient single channel, two-phase flow, and heat transfer code for analysis of postulated reactor incidents involving boiling. The code is based on a homogeneous hydrodynamic model which assumes equal phase temperatures and velocities. It assumes vapor generation to be heat transfer limited only, and calculates axial distribution of velocity, void fraction, pressure, coolant temperature, and fuel temperature. Transients simulating power excursions, loss of flow, loss of pressure and channel plugging can be studied.

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4. METHOD OF SOLUTION

Each transient starts from some steady-state condition derived from input parameters. One of these selected by the user varies with time and the program calculates the response of the system to this driving function. The heat balance equations are solved by use of finite difference techniques and the momentum equation is derived assuming constant vapor density and saturation temperature, eliminating pressure feedback. Numerical instabilities resulted when attempts were made to remove these limitations. The code is set up to provide use of a smaller time-step for the momentum equation than that used for the heat balance and mass equations if requested.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM: Maximum of - 100 spatial nodes.

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6. TYPICAL RUNNING TIME: 2 to 4 minutes are required for an 80-node problem.

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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM

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8. RELATED OR AUXILIARY PROGRAMS: RELATED AND AUXILIARY PROGRAMS

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9. STATUS

Package ID	Status date	Status
NESC0268/01	01-SEP-1968	Tested at NEADB

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10. REFERENCES

- R.C. Noyes, J.G. Morgan, and H.H. Cappel:
  Trans-FUGUE-I, A Digital Code for Transient Two-Phase Flow and
  Heat Transfer
  NAA-SR-11008 (July 1965).
- M. Hoffman and W.A. Rhoades:
  AICRT3, A General Code for Display of Digital Data
  NAA-SR-MEMO-9069 (October 1963).

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11. MACHINE REQUIREMENTS: 32k memory

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NESC0268/01	FORTRAN-II (IBM)

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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED: Standard IBM FORTRAN monitor.

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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

If an SC-4020 graphical display device is available, AICRT3 and the NAA SC-4020 package are available through

UAIDE Librarian
                      c/o Stromberg-Carlson
                      P. O. Box 2449
                      San Diego, California, U. S. A.

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15. NAME AND ESTABLISHMENT OF AUTHOR

                 R. C. Noyes, J. G. Morgan, and H. H. Cappel
                 Atomics International
                 P. O. Box 309
                 Canoga Park, California U. S. A.

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16. MATERIAL AVAILABLE

NESC0268/01