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Effect of water temperature on air-core generation and disappearance during draining

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Abstract

Understanding the air-core development during the draining of liquid from a cylindrical tank is of particular interest because this phenomenon has multiple engineering applications. In this study, experiments are performed for draining water of different temperatures from a cylindrical tank. Results show that the air-core generation and disappearance during draining depend on the temperature of the water in the tank, in which the total draining time increases with the water temperature. A correlation is proposed to predict the water height with time during draining. A numerical study is then performed for some of the temperature cases. Numerical and correlation results show a good agreement with the experimental data. Findings show that viscosity plays an important role behind the mechanism of air-core generation and disappearance phenomena.

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Authors and Affiliations

  1. School of Mechanical Engineering, Kyungpook National University, Daegu, 702-701, Korea

    Kamran Nazir & Chang Hyun Sohn

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  1. Kamran Nazir
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  2. Chang Hyun Sohn
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Correspondence to Chang Hyun Sohn.

Additional information

Recommended by Associate Editor Hyoung-Bum Kim

Kamran Nazir received his M.Sc. (Eng.) in Mechanical Engineering from the National University of Sciences and Technology, Pakistan. He is currently a Ph.D. student at Kyungpook National University, South Korea. His research interests include multiphase flow, CFD, and building environment.

Chang Hyun Sohn received his M.Sc. (Eng.) and Ph.D. in Mechanical Engineering in 1985 and 1991 from KAIST, respectively. He worked in ADD for three years. He worked in Cambridge University as a Visiting Assistant Professor in 1996. He works at the School of Mechanical Engineering, Kyungpook National University as a Professor since 1994. His research interests include CFD, PIV, flow-induced vibration and thermal hydraulics in mechanical engineering.

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Nazir, K., Sohn, C.H. Effect of water temperature on air-core generation and disappearance during draining. J Mech Sci Technol 32, 703–708 (2018). https://doi.org/10.1007/s12206-018-0118-0

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  • DOI: https://doi.org/10.1007/s12206-018-0118-0

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