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Ocean Systems Engineering
  Volume 2, Number 1, March 2012 , pages 17-31

Modeling of non-isothermal CO2 particle leaked from pressurized source: I. Behavior of single bubble
Daejun Chang, Sang Heon Han and Kyung-won Yang

    This study investigated the behavior of a non-isothermal CO2 bubble formed through a leak process from a high-pressure source in a deep sea. Isenthalpic interpretation was employed to predict the state of the bubble just after the leak. Three modes of mass loss from the rising bubble were demonstrated: dissolution induced by mass transfer, condensation by heat transfer and phase separation by pressure decrease. A graphical interpretation of the last mode was provided in the pressure-enthalpy diagram. A threshold pressure (17.12 bar) was identified below which the last mode was no longer present. The second mode was as effective as the first for a bubble formed in deep water, leading to faster mass loss. To the contrary, only the first mode was active for a bubble formed in a shallow region. The third mode was insignificant for all cases.
Key Words
    CO2; bubble; depletion; dissolution; condensation; isenthalpic expansion
Daejun Chang and Sang Heon Han : Division of Ocean Systems Engineering, Korea Advanced Institute of Science and Technology, Daejeon,Republic of Korea
Kyung-won Yang : Det Norske Veritas Korea, Busan, Republic of Korea

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