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Phase diagrams and interface in inflating balloon
Author(s) -
Meng Fanlong,
Chen Jeff Z. Y.,
Doi Masao,
Ouyang Zhongcan
Publication year - 2014
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14410
Subject(s) - binodal , spinodal , phase diagram , cylinder , spinodal decomposition , mechanics , hysteresis , critical point (mathematics) , thermodynamics , phase (matter) , phase transition , tricritical point , balloon , materials science , physics , geometry , condensed matter physics , mathematics , quantum mechanics , medicine , cardiology
When a cylindrical balloon is inflated, inflation often takes place nonuniformly, inflated near one end first and followed by the growth of this part along the entire cylinder. This phenomenon is discussed from the phase‐transition perspective in terms of the Gent model, a free‐energy model that has the same structure as that of the gas–liquid transition in normal fluids. A phase diagram which describes the inflation behavior is constructed, showing the binodal and spinodal curves terminated at a critical point. The hysteresis effects are discussed based on the phase diagram. The interface between the coexisting inflated and weakly inflated regions along the cylindrical balloon is also examined, and the interfacial thickness and the interfacial energy are numerically calculated. © 2014 American Institute of Chemical Engineers AIChE J , 60: 1393–1399, 2014