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Title: Investigation of fluid transients in pipelines with air entrainment
Authors: Lee, T.S. 
Nguyen, D.T. 
Low, H.T. 
Koh, J.Y.
Keywords: Air entrainment
Bubbly flows
Liquid-gas two-phase flows
Pressure transient
Variable wave speed
Issue Date: Oct-2008
Citation: Lee, T.S.,Nguyen, D.T.,Low, H.T.,Koh, J.Y. (2008-10). Investigation of fluid transients in pipelines with air entrainment. Advances and Applications in Fluid Mechanics 4 (2) : 117-133. ScholarBank@NUS Repository.
Abstract: This paper introduces a variable wave speed model for the calculation of fluid transients in pipelines with air entrainment in which wave speed at every point along the pipeline depends on the local pressure and local air void fraction at that point. A set of experiments was carried out in a single pump pipeline system to test the fluid transient behaviour for the case of pump trip due to power failure and to validate the numerical model. In comparison with experimental results, numerical results show that the variable wave speed model can provide a closely transient pressure prediction for the first pressure peak. However, there are the discrepancies between the computational predicted results and the experimental results for the next pressure surges especially in the rate of pressure damping. This limitation points to the need for further refinements of the variable wave speed model to improve the accurate of the pressure transient prediction. © 2008 Pushpa Publishing House.
Source Title: Advances and Applications in Fluid Mechanics
ISSN: 09734686
Appears in Collections:Staff Publications

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