A method for pressure calculations in ball valves containing bubbles

Lookeren Campagne van, C. and Nicodemus, R. and Bruin de, G.J. and Lohse, D. (2002) A method for pressure calculations in ball valves containing bubbles. Journal of Fluids Engineering, 124 (3). pp. 765-771. ISSN 0098-2202

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Abstract:	A method of analyzing bubbly flow in a ball valve in a hydraulic circuit is presented. The dynamics of a single bubble can be well described by a quasi-static approximation of the Rayleigh-Plesset equation. Hence the presence of bubbles in low volume fractions can be modeled through an effective compressibility of the flow, which is easy to implement in commercial CFD packages. In the sample valve, a volume fraction of 4% air bubbles results in a mass flux reduction of up to 10%, as the bubbles expand due to the pressure drop in the valve and partly block it.
Item Type:	Article
Copyright:	© 2002 American Society of Mechanical Engineers
Faculty:	Science and Technology (TNW)
Research Group:	Physics of Fluids (POF)
Link to this item:	http://purl.utwente.nl/publications/43795
Official URL:	http://dx.doi.org/10.1115/1.1486220
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Metis ID: 207433