World Environmental and Water Resources Congress 2020
The Impacts of Time Integration Schemes on the Pressure Surge Prediction in a Closed Conduit Transient Flow
Publication: World Environmental and Water Resources Congress 2020: Hydraulics, Waterways, and Water Distribution Systems Analysis
ABSTRACT
The pressure surge prediction in a closed conduit partially pressurized transient flow has been investigated following suddenly blocking the pipe downstream end. In a shock-fitting approach, the rigid column model as well as the Saint-Venant equations set and the ideal gas law for air pocket variations were used for the computations. The aim was to examine the performance of the shock-fitting approach and possible effects of the explicit and implicit time integration schemes on the quality of the solutions. It was found that the shock-fitting approach can improve the quality of the solutions compared to the rigid column model provided that implicit schemes are used for time integrations. The main reason is due to more dissipative property of implicit schemes, compared to explicit schemes, by which the extra kinetic energy associated with the approximation of the models can be dissipated.
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Published In
World Environmental and Water Resources Congress 2020: Hydraulics, Waterways, and Water Distribution Systems Analysis
Pages: 225 - 236
Editors: Sajjad Ahmad, Ph.D., and Regan Murray, Ph.D.
ISBN (Online): 978-0-7844-8297-1
Copyright
© 2020 American Society of Civil Engineers.
History
Published online: May 14, 2020
Published in print: May 14, 2020
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