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Numerical simulation of bubbly flow in a vertical pipe using TPFIT code

TPFITコードを用いた垂直管内気泡流の数値解析

Jiao, L.; 吉田 啓之  ; 高瀬 和之

Jiao, L.; Yoshida, Hiroyuki; Takase, Kazuyuki

In this study, a numerical simulation of bubbly flow in a vertical circular pipe was performed using TPFIT code developed in JAEA. Moreover, the simulation results were compared with existing experimental data to check the applicability of the TPFIT to bubble dynamics regarding bubble deformation, coalescence and fragmentation. In this simulation, bubble developing process in a vertical circular pipe under the two-phase flow condition consisting of air and water were investigated numerically. And the bubbly flow with the wall peak bubble distribution was predicted. Furthermore, the difference between experimental results and numerical simulation was analyzed in detail from the development of bubble size in the flow direction and the generation of bubbles. It is pointed out that the details of bubble coalescence and fragmentation can be predicted by the TPFIT by refining the grid size near air injection nozzles in future.

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