TOPAZ - the transient one-dimensional pipe flow analyzer: equations and numerics

Winters, W.S.

doi:10.2172/6366462

Cited by 1 publication

(1 citation statement)

References 6 publications

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“…Sandia's first network flow modeling tool dedicated to the solution of gas transfer problems was the computer code TOPAZ (Transient One-dimensional Pipe flow AnalyZer). TOPAZ has been extensively documented in References [8][9][10][11]. TOPAZ has been recently replaced by NETFLOW (see e.g.…”

Section: History and Description Of Network Flow Modelingmentioning

confidence: 99%

Transient PVT measurements and model predictions for vessel heat transfer. Part II.

Report¹,

Rice²,

Paradiso³

et al. 2010

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Part I of this report focused on the acquisition and presentation of transient PVT data sets that can be used to validate gas transfer models. Here in Part II we focus primarily on describing models and validating these models using the data sets. Our models are intended to describe the high speed transport of compressible gases in arbitrary arrangements of vessels, tubing, valving and flow branches. Our models fall into three categories: (1) network flow models in which flow paths are modeled as one-dimensional flow and vessels are modeled as single control volumes, (2) CFD (Computational Fluid Dynamics) models in which flow in and between vessels is modeled in three dimensions and (3) coupled network/CFD models in which vessels are modeled using CFD and flows between vessels are modeled using a network flow code. In our work we utilized NETFLOW as our network flow code and FUEGO for our CFD code. Since network flow models lack three-dimensional resolution, correlations for heat transfer and tube frictional pressure drop are required to resolve important physics not being captured by the model. Here we describe how vessel heat transfer correlations were improved using the data and present direct model-data comparisons for all tests documented in Part I. Our results show that our network flow models have been substantially improved. The CFD modeling presented here describes the complex nature of vessel heat transfer and for the first time demonstrates that flow and heat transfer in vessels can be modeled directly without the need for correlations. 4 ACKNOWLEDGMENTS

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Section: History and Description Of Network Flow Modelingmentioning

confidence: 99%