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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
EVALUATION OF VOID FRACTION METHODS IN SMALL DIAMETER TUBES
Submission Author:
Cristiano Tibiriçá , SP
Co-Authors:
Guilherme Sakita, Fernando Neves Quintino dos Santos, Cristiano Tibiriçá
Presenter: Cristiano Tibiriçá
doi://10.26678/ABCM.ENCIT2020.CIT20-0598
Abstract
Void fraction of cross section of an internal flow is an important parameter on the analysis of two-phase flow systems. The literature about the void fraction methods presents some lacks about the evaluation of these methods in small diameter tubes (diameters up to 10 mm). This paper focus on evaluation of three void fraction correlations, the homogenous correlation, the drift flux type correlation of Woldesemayat and Ghajar (2007) and the slip type correlation of Tibiriçá et. al (2017). Experimental measures of void fraction of air-water flows in a 7 mm inner diameter and 1.5 m long glass tube using the quick-closing valves (QCV) technique are performed in order to assess which correlations are most suitable. At the end of the study, it is concluded that the Woldesemayat and Ghajar (2007) and the Tibiriçá et. al (2017) correlations could well predict the void fraction in these tubes.
Keywords
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