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Title: Transient One-dimensional Pipe Flow Analyzer

Abstract

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.

Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
1231006
Report Number(s):
TOPAZ-SNLL; 002104MLTPL00
Resource Type:
Software
Software Revision:
00
Software Package Number:
002104
Software Package Contents:
Media Directory; Software Abstract; Media includes Source Code;/1 CD ROM
Software CPU:
MLTPL
Open Source:
No
Source Code Available:
Yes
Other Software Info:
The sequence of subroutines beginning with ESINIT and ending with ZROCHK are only called when the MIXT=3 flag (REGION minor directive) is used to specify the Clark-Ashurst five species model of hydrogen- helium isotopes. These routines were written by Gary Clark, now at Los Alamos National Laboratory in Los Alamos, New Mexico (USA). While these are the most accurate equation of state routines for hydrogen-helium isotope mixtures, it is not recommended that they be used in transient gas transfer calculations with TOPAZ. Such calculations are extremely time consuming compared to the other avalaible models (MIXT=l,2,4,5) and the subroutines ESINIT through ZROCHK do not have sufficient error trapping to prevent the calculation of fictitious states (negative pressures, etc.) while the code is iterating to the final solution. The MIXT3 option is most useful in checking initial and final states for accuracy, e.g. comparing the state calculated by MIXT=l to the state calculated by the more accurate MIXT=3 option. The results obtained at NEA-DB with input file for Example 3 (page 31 of the report SAND85-8215) are different from those printed on page 45 of the same report. We are asking the author for clarification. However for Example 8 included in the original package, we do not have a sample output for comparison.
Country of Publication:
United States

Citation Formats

. Transient One-dimensional Pipe Flow Analyzer. Computer software. Vers. 00. USDOE. 8 Apr. 1986. Web.
. (1986, April 8). Transient One-dimensional Pipe Flow Analyzer (Version 00) [Computer software].
. Transient One-dimensional Pipe Flow Analyzer. Computer software. Version 00. April 8, 1986.
@misc{osti_1231006,
title = {Transient One-dimensional Pipe Flow Analyzer, Version 00},
author = {},
abstractNote = {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.},
doi = {},
year = 1986,
month = 4,
note =
}

Software:
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  • TOPAZ is a ''user friendly'' computer code for modeling the one-dimensional-transient physics of multi-species gas transfer in arbitrary arrangements of pipes, valves, vessels, and flow branches. This document presents a series of sample problems designed to aid potential users in creating TOPAZ input files. To the extent possible, sample problems were selected for which analytical solutions currently exist. TOPAZ comparisons with such solutions are intended to provide a measure of code validation.
  • TOPAZ is a ''user friendly'' computer code for modeling the one-dimensional-transient physics of multi-species gas transfer in arbitrary arrangements of pipes, valves, vessels, and flow branches. This document serves as a user's manual for the code, and should provide potential users with enough information to take advantage of many of the code's capabilities. Details regarding equations and numerics, example problems, applications, and modeling assumptions will be discussed in companion documents.
  • TOPAZ is a ''user-friendly'' computer code for modeling the one-dimensional, transient physics of multi-species gas transfer in arbitrary arrangements of pipes, valves, vessels, and flow branches. This report, the fourth in a series of reports documenting TOPAZ, discusses coding improvements and the addition of new capabilities. These improvements make the current version of TOPAZ considerably more versatile than the original version which was distributed last year. For example, the new version does not restrict the user to modeling only hydrogen and helium isotope flows. Users now have the capability of modeling arbitrary gas mixture flows. In addition users may definemore » time-dependent functions for mass generation, energy deposition, flow area, and maximum integration time step. Parallel flow paths and flows through channels having noncircular cross-sections may now be simulated. Improvements in TOPAZ mesh generation have been made which permit users to add additional ''plumbing'' to existing models without renumbering the mesh. 7 refs., 3 figs., 8 tabs.« less
  • TOPAZ is a ''user friendly'' computer code for modeling the one-dimensional, transient physics of multi-species gas transfer in arbitrary arrangements of pipes, valves, vessels, and flow branches. This report, the third in a series of reports documenting TOPAZ, deals exclusively with governing equations, numerical methods, and code architecture.

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