断面の変化する円管内を通過する単一気泡挙動の数値シミュレーション(流体工学,流体機械)

概要

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The numerical simulation of the behavior of a single bubble passing through a circular pipe with the change of cross section has been carried out by the C-CUP method coupled with CSF model and Level-set method. This method can deal with both incompressible and compressible two-phase flows including surface tension effect. The present calculation succeeds in satisfying the mass conservation law for the compressible flow in a bubble in remarkably good accuracy. The results present how the shape of a bubble is deformed and the pressure changes when it passes in the parts of a sudden expansion and a throal of a pipe flow at different values of Re and We numbers. It is also shown that some vortex-rings are formed in a wake of a bubble through a sudden expansion part of a pipe at the high Reynolds number of 500.
社団法人日本機械学会の論文
2006-05-25