海洋中層におけるCO_2液滴プルームの数値シミュレーション

概要

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The present paper proposes a numerical simulation method of two-phase flow for analysing LCO_2 (liquid CO_2) droplet plume at the middle depth of the deep ocean. This method contains. the drift velocity of the LCO_2 droplets and the dissolution of CO_2 into the sea water as notable features. After being validated by comparing well with laboratory-scale air-bubble-plume experiments in literature, it is applied to the simulation of LCO_2 plume in the deep ocean. The results indicate some new phenomena contradicting currently widespread conceptions: the present simulation suggests, firstly, that the dense CO_2 solute does not peel from the LCO_2 plume and, instead, forms the fountain-like flow against the rising plume and, secondly, that the maximal vertical distance for the complete dissolution of the LCO_2 droplets does_ not vary very much depending on the initial droplet size.
社団法人日本船舶海洋工学会の論文