Journal of Mechanical Science and Technology

, Volume 32, Issue 2, pp 703–708 | Cite as

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

  • Kamran Nazir
  • Chang Hyun SohnEmail author


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.


Air-core Water temperature Cylindrical tank draining Drain time 


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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Mechanical EngineeringKyungpook National UniversityDaeguKorea

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