Pumping-Through方式によるバラスト水交換の水理模型タンク内の濃度変化の数値計算

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This paper deals with the numerical calculation of water color diffusion varying by flow in the Hydraulic model tank of ballast water exchange by pumping-through method. It is demanded by the IMO that ballast tank water from the ships should be exchange using Pumping-through method until 2016. By this method, it is assumed that 95% of the ballast water exchange in the tank is possible if sea water of 3 times of ballast water discharge using this method. In our previous work, the hydraulic model experiment of ballast water exchange by pumping-through method was carried out・The ballast water was 2-dimensional profile. The experimental results showed that pumping-through method can dilute about 95% of ballast water if water volume of 3 times of the model tank was overflowed. Also, the numerical calculation of flow in the hydraulics model tank of ballast water exchange by Pumping-through method was carried out by the differential method. In this paper, the numerical calculation of diffusion of water color varying by flow in the experimental tank was carried out by the equation of transfer-diffusion・The calculated result showed the distribution of diffusion of water color.
社団法人日本航海学会の論文
2006-03-25