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Title of Journal: Water Resour Manage

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Abbravation: Water Resources Management

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Springer Netherlands

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DOI

10.1006/reli.1996.0040

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ISSN

1573-1650

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Study of a Compressed Air Vessel for Controlling t

Authors: Mohsen Besharat Reza Tarinejad Mohammad Taghi Aalami Helena M Ramos
Publish Date: 2016/04/11
Volume: 30, Issue: 8, Pages: 2687-2702
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Abstract

Air chambers show good ability in controlling the pressure surge from a water hammer WH phenomenon To simulate an air chamber and study the behavior of air inside it a compressed air vessel CAV is considered in a pressurized system The current work consists of experimental tests and onedimensional 1D and twodimensional 2D computational fluid dynamics CFD simulations for an air pocket within a CAV in the case of rapid pressurization and the occurrence of WH in a pressurized system The pressure variations create vorticity and turbulence with oscillating behaviors but the available 1D models are unable to simulate those phenomena adequately Therefore by using the measured data proper CFD analysis is conducted considering the effect of the wall y + mesh size turbulence and the wall treatment method to better understand the behavior of the system Results of the CFD simulation show that realizable kε turbulence model when coupled with the enhanced wall treatment EWT method works adequately for modeling the pressure oscillation The volume of fluid VOF model and the piecewise linear interface calculation PLIC method have presented good ability in the prediction of the airwater interface

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