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Numeric Modeling of Water Mains Filling Considering Air Pressurization

Gabriel M. Leite and Jose Vasconcelos (2011)
Auburn University
DOI: https://doi.org/10.14796/JWMM.R241-01
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Abstract

The filling of water mains represents a type of unsteady, two phase flow that normally follows maintenance procedures which require emptying the mains. This is performed carefully to avoid the formation of air pockets, which can cause high pressures in conduits and also reduce their conveyance capacity. Numerical modeling is an essential tool for the study of this kind of problem as a means of anticipating operational issues. Among the models proposed for this application are those of Liou and Hunt (1996), Izquierdo et al. (1999) and Vasconcelos (2007). Such models’ applicability is limited due to the assumptions made in their development, which include simplified shapes of water filling fronts, and non-consideration of ventilation systems or air pressurization effects. This chapter will present a numerical model for the simulation of gradual water mains filling that allows for both a more realistic inflow front and the development of air pressurization. The model solves a system of ordinary differential equations which represent the advance of the inflow front, the development of air pressurization, and conservation of the air phase. The model uses Object Pascal and has a friendly and interactive user interface, and future tests will present a comparison between model predictions and laboratory measurements.

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PAPER INFO

Identification

CHI ref #: R241-01 734
Volume: 19
DOI: https://doi.org/10.14796/JWMM.R241-01
Cite as: CHI JWMM 2011;R241-01

Publication History

Received: N/A
Accepted: N/A
Published: February 15, 2011

Status

# reviewers: 2
Version: Final published

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© 2011 CHI. Some rights reserved.

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Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

The Journal of Water Management Modeling is an open-access (OA) publication. Open access means that articles and papers are available without barriers to all who could benefit from them. Practically speaking, all published works will be available to a worldwide audience, free, immediately on publication. As such, JWMM can be considered a Diamond, Gratis OA journal.

All papers published in the JWMM are licensed under a Creative Commons Attribution 4.0 International License (CC BY).

JWMM content can be downloaded, printed, copied, distributed, and linked-to, when providing full attribution to both the author/s and JWMM.


AUTHORS

Gabriel M. Leite

Auburn University, Auburn, AL, USA
ORCiD:

Jose Vasconcelos

Auburn University, Auburn, AL, USA
ORCiD:


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