Flows consisted of more than two different phases of gas, liquid or solid are called multiphase flows. In this paper, the numerical methods of dispersed multiphase flows, which are the flows containing a large number of bubbles, drops or particles, are discussed. The fundamental characteristic of dispersed flows is its multi-scale structure. It contains the wide variety of scales, starting from the molecular scale to that of the large structure in the flow. For example, in the case of bubbly flow, it is known that very small amount of contaminant can drastically change the rising velocity of a bubble and it ends up with the change of macro-scale structure of the whole bubbly now through the micro-, meso- and macro- scale interactions. In this paper, the numerical methods to capture these multi-scale flow structures and the related problems are discussed.
抄録全体を表示