NESC9669 TOPAZ-SNLL.

TOPAZ-SNLL, Transient 1-D Pipe Flow Analysis

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: TOPAZ-SNLL.

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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
TOPAZ-SNLL	NESC9669/01	Tested	21-SEP-1988

Machines used:

Package ID	Orig. computer	Test computer
NESC9669/01	CRAY 1	CRAY X-MP

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3. DESCRIPTION OF PROGRAM OR FUNCTION

TOPAZ-SNLL, the Transient One- dimensional Pipe flow AnalyZer code, is a user-friendly computer program for modeling the heat transfer, fluid mechanics, and thermodynamics of multi-species gas transfer in arbitrary arrangements of pipes, valves, vessels, and flow branches. Although the flow conservation equations are assumed to be one-dimensional and transient, multidimensional features of internal fluid flow and heat transfer may be accounted for using the available quasi-steady flow correlations (e.g., Moody friction factor correlation and various form loss and heat transfer correlations). Users may also model the effects of moving system boundaries such as pistons, diaphragms, and bladders. The features of fully compressible flow are modeled, including the propagation of shocks and rarefaction waves, as well as the establishment of multiple choke points along the flow path.

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4. METHOD OF SOLUTION

The flow conservation equations are discretized in space using conventional upwind finite differences. The spatially discretized gas flow equations together with the equations describing the motion of system boundaries constitute a set of mixed algebraic and ordinary differential equations. This equation set is solved implicitly using DASSL (NESC 9918), a differential-algebraic system solver. The DASSL software is included.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:

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6. TYPICAL RUNNING TIME

On the Cray1, the simplest problems involving the transfer of gas from a high pressure reservoir to a low pressure receiver via a single pipe generally consume less than 30 seconds of CPU time. When a large number, say 10 or more, vessels are interconnected by a complex arrangement of finely discretized flow paths with multiple branches and numerous ID changes, CPU times may extend to several hours.

NESC9669/01

The test cases included in this package have been run at the NEA-DB on a CRAY-XMP/2200 computer. Execution times were: 87 seconds (exemple 3); 37 seconds (exemple 8).

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7. UNUSUAL FEATURES OF THE PROGRAM

TOPAZ checks the data for completeness and consistency and then generates a finite difference mesh to model the user's gas transfer network. The code is designed to permit users who are unfamiliar with the details of fluid mechanics, heat transfer, and numerical methods to make complex multi-species gas transfer calculations.

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8. RELATED AND AUXILIARY PROGRAMS:

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9. STATUS

Package ID	Status date	Status
NESC9669/01	21-SEP-1988	Tested at NEADB

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10. REFERENCES

- TOPAZ-SNLL, NESC No. 9669, Author's Notes on Adapting TOPAZ-SNLL
to Other Computer Environments,
National Energy Software Center Note 86-30, April 8, 1986.

NESC9669/01, included references:

- W.S. Winters:
  TOPAZ - The Transient One-Dimensional Pipe Flow Analyzer:
  User's Manual
  SAND85-8215  (July 1985)
- W.S. Winters:
  TOPAZ - The Transient One-Dimensional Pipe Flow Analyzer:
  Code Validation and Sample Problems
  SAND85-8236  (October 1985)
- W.S. Winters:
  TOPAZ - The Transient One-Dimensional Pipe Flow Analyzer:
  Equations and Numerics
  SAND85-8248  (December 1985)
- W.S. Winters:
  TOPAZ - The Transient One-Dimensional Pipe Flow Analyzer:
  An Update On Code Improvements and Increased Capabilities
  SAND87-8225  (September 1987)
- W.S. Winters:
  An "Online" Documentation for the Computer Code TOPAZ.
  (April 1987)

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11. MACHINE REQUIREMENTS: minimum of 89K words.

NESC9669/01

174,000 words of main storage were required to run the test cases on a CRAY-XMP/2200 computer.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NESC9669/01	FORTRAN-77

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED: CTSS.

NESC9669/01

COS 1.15 with CFRT 1.14 compiler (CRAY-XMP/2200).

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHORS

W.S. Winters, Jr.
Sandia National Laboratories, Livermore

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16. MATERIAL AVAILABLE

NESC9669/01

File name	File description	Records
NESC9669_01.001	Information file	72
NESC9669_01.002	JCL and control information	22
NESC9669_01.003	TOPAZ10, maschine-readable documentation	1112
NESC9669_01.004	TOPAZ-SNLL FORTRAN source	10549
NESC9669_01.005	TOPAZ-SNLL aux. routines	16
NESC9669_01.006	Example 3 sample problem input	53
NESC9669_01.007	Example 8 sample problem input	84
NESC9669_01.008	Example 3 sample problem output	309
NESC9669_01.009	Example 8 sample problem output	1128