3009 格子ボルツマン法を用いた平板に落下する高粘性流体の噴流シミュレーション(OS-30C 格子ボルツマン・ガス法,OS-30 格子ボルツマン・ガス法)

概要

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Fluid buckling or liquid rope coiling, which is one of low-Reynolds number instabilities, is simulated using the two-phase lattice Boltzmann method with large density differences. In the present calculations, a highly viscous liquid jet in a gas phase falls vertically against a flat plate under gravitational force. We investigate the effect of the Reynolds number (Re) and the Froude number (Fr) on buckling instability. Also, the calculated results of jet behavior are compared with those by experiments of the authors' own carrying out. According to the present simulations, for Re=32 and Fr=2.9 the jet falls down stably without oscillation. On the other hand, for Re=0.40 and Fr=0.37 in which the instability condition of the Reynolds number is satisfied, the fluid buckling occurs and the jet behavior is in qualitative agreement with experimental results.
一般社団法人日本機械学会の論文
2005-11-17