World Environmental and Water Resources Congress 2019
Evaluation of Mathematical Model Alternatives for the Simulation of Unsteady, Two-Phase Flows in Urban Water Systems
Publication: World Environmental and Water Resources Congress 2019: Hydraulics, Waterways, and Water Distribution Systems Analysis
ABSTRACT
Rapid filling flows in stormwater systems during rain events has been cause of diverse operational problems and as result this has been investigated by a significant group of researchers to date. Frequently in these studies, a variety of numerical modeling tools has been applied while trying to understand these unsteady, two-phase flow conditions. A wide variety of modeling strategies has been created to date and, associated with this models, various mathematical formulations were proposed to describe such flows. These range from a simple system of ordinary differential equations, passing through systems of one-dimensional partial differential equations, all the way into Navier-Stokes equations associated with a free surface flow tracking algorithm. There has been limited discussion on the merits, advantages, and limitations of each approach. This manuscript provides a preliminary survey of alternatives to represent unsteady, two-phase flows in urban water systems, with a focus here in one-dimensional formulations. This is a part of a concerted effort of the EWRI Task Committee on Unsteady Two-phase Flows in Urban Water Systems to provide designers with better guidelines to include in their projects the effects of air in the hydraulics of these water systems.
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Published In
World Environmental and Water Resources Congress 2019: Hydraulics, Waterways, and Water Distribution Systems Analysis
Pages: 99 - 108
Editors: Gregory F. Scott and William Hamilton, Ph.D.
ISBN (Online): 978-0-7844-8235-3
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: May 16, 2019
Published in print: May 16, 2019
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