Numerical Analysis of a Single Rising Bubble Using Boundary-Fitted Coordinate System
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概要
- 論文の詳細を見る
A numerical method is developed to simulate unsteady axisymmetric flow with a free surface. The method is based on a finite-volume solution of the equations on an orthogonal curvilinear coordinate system. A new iteration technique is used for the boundary condition of the free surface in order to stabilize the solution. The numerical method is applied to the simulation of unsteady motion of a single deformed bubble rising through a quiescent liquid. The numerical results show good quantitative agreement with those of experiments and calculations reported previously by other researchers. In the present study, the transient phenomena of an initially spherical bubble as it reaches the steady state are investigated. It is known experimentally that the rising bubble begins to show an unsteady three-dimensional(spiral or zigzag)motion beyond certain critical Reynolds and Weber numbers. Our numerical results suggest that the growth of axisymmetric shape oscillation causes three-dimensional motions of a rising bubble.
- 一般社団法人日本機械学会の論文
- 1997-02-15
著者
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Matsumoto Yoichiro
Department Of Mechanical Engineering The University Of Tokyo
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Takagi Shu
Department Of Mechanical Engineering The University Of Tokyo
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HUANG Huaxiong
University of Manchester Institute of Science and Technology
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Matsumoto Yoichiro
Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Takagi Shu
Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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