Abstract
When considering the flow of a two-phase mixture, the complete characterization of its behavior requires not only the evaluation of its temperature and pressure evolutions, but also the description of the distribution of the phases (the so-called “flow structure”). This is of great importance in problems concerning the analysis of the solicitations undergone by the containing ducts, both from a mechanical point of view and — even more important — when heat transfer at fixed power is involved. In the present paper some methodologies are presented, which proved to be very useful in the description and quantitative visualization of the structure of a two-phase flow: for liquid-gas mixtures, they are based on relatively simple experimental acquisitions of a single quantity and allow a detailed visualization of the flow structure without requiring visual observation of the same.
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Sergio Arosio: He is a full professor of Thermodynamics — Heat and Mass Transfer at Politecnico di Milano (Italy). He graduated in Mechanical Engineering at Politecnico di Milano in 1971. Research area: he has been carrying out researches in the fluid dynamics and energy field with a special attention to heat exchange in condensation/evaporation in microfin tubes, two-phase flow fluid dynamics in adiabatic contour and non-conventional energy conversion systems. Scientific publications: he is the author of over 100 research papers on the above mentioned fields.
Manfredo Guilizzoni: He received his M.Sc. (Eng.) degree in Industrial Engineering in 1999 from Politecnico di Milano and his Ph.D. in Energy Engineering in 2002 from the same university. He currently is an assistant professor at Politecnico di Milano. His current research interests are multiphase fluid dynamics, technical and economic analysis of thermodynamic cycles and computer graphics.
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Arosio, S., Guilizzoni, M. Structure visualization for a gas-liquid flow. J Vis 9, 275–282 (2006). https://doi.org/10.1007/BF03181674
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DOI: https://doi.org/10.1007/BF03181674