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http://dx.doi.org/10.3795/KSME-B.2014.38.5.373

Numerical Study of Wavy Film Flow on Vertical Plate Using Different Turbulent Models  

Min, June Kee (Rolls-Royce University Technology Center, Pusan Nat'l Univ.)
Park, Il Seouk (School of Mechanical Engineering, Kyungpook Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.38, no.5, 2014 , pp. 373-380 More about this Journal
Abstract
Film flows applied to shell-and-tube heat exchangers in various industrial fields have been studied for a long time. One boundary of the film flow interfaces with a fixed wall, and the other boundary interfaces with a gaseous region. Thus, the flows become so unstable that wavy behaviors are generated on free surfaces as the film Reynolds number increases. First, high-amplitude solitary waves are detected in a low Reynolds number laminar region; then, the waves transit to a low-amplitude, high frequency ripple in a turbulent region. Film thickness is the most significant factor governing heat transfer. Since the wave accompanied in the film flow results in temporal and spatial variations in film thickness, it can be of importance for numerically predicting the film's wavy behavior. In this study, various turbulent models are applied for predicting low-amplitude ripple flows in turbulent regions. The results are compared with existing experimental results, and finally, the applied turbulent models are appraised in from the viewpoint of wavy behaviors.
Keywords
Vertical Plate; Free Suface Flow; Turbulent Model; Computational Fluid Dynamics; Wavy Film Flow;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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