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ISSN Печать: 0276-1459
ISSN Онлайн: 1943-6181
Indexed in
PATTERN DYNAMICS SIMULATION OF VOID WAVE PROPAGATION
Краткое описание
Gas-liquid two-phase flow is a typical complex system with intrinsic spatiotemporal fluctuation in phase distribution, pressure drop, heat transfer, and so on, being an important subject left behind after extensive research on two-phase flow dynamics. Previously developed modeling is not appropriate in application to CHF problems at low quality and/or in downward flow. This is mainly because conventional modeling, including two-fluid modeling, is based on the continuous flow hypothesis. The proposed model, represented by the discrete bubble model, consists of a void propagation equation as a global rule and only a limited number of mechanical and geometrical relationships as local rules, i.e., a wake effect, gas compressibility, and a phase redistribution mechanism. Neglecting detailed mechanisms of two-phase flow, the spatiotemporal fluctuations in void fraction and pressure drop are numerically realized within the framework of the pattern dynamics approach.
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Ami Takeyuki, Umekawa Hisashi, Ozawa Mamoru, Shoji Masahiro, Traveling void wave in horizontal two-phase flow, International Journal of Heat and Mass Transfer, 52, 25-26, 2009. Crossref
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Ozawa Mamoru, Ami Takeyuki, Umekawa Hisashi, Matsumoto Ryosuke, Hara Takashi, Forced flow boiling of carbon dioxide in horizontal mini-channel, International Journal of Thermal Sciences, 50, 3, 2011. Crossref
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Ozawa Mamoru, Ami Takeyuki, Ishihara Isao, Umekawa Hisashi, Matsumoto Ryosuke, Tanaka Yasuhiko, Yamamoto Taku, Ueda Yuya, Flow pattern and boiling heat transfer of CO2 in horizontal small-bore tubes, International Journal of Multiphase Flow, 35, 8, 2009. Crossref
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NAKAMURA Noriko, AMI Takeyuki, UMEKAWA Hisashi, OZAWA Mamoru, , JAPANESE JOURNAL OF MULTIPHASE FLOW, 24, 5, 2011. Crossref