A Coupled CFD-DEM Study on the Effect of Basset Force Aimed at the Motion of a Single Bubble期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

A Coupled CFD-DEM Study on the Effect of Basset Force Aimed at the Motion of a Single Bubble

Authors:	Huiting Chen,Weitian Ding,Han Wei,Henrik Saxé n,Yaowei Yu

Affiliation:	1.State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;2.Thermal and Flow Engineering Laboratory, Department of Chemical Engineering, Åbo Akademi University, Biskopsgatan 8, FI-20500 Åbo, Finland

Abstract:	The physical meaning of Basset force is first studied via polynomial approximation and the Fourier series representation method. After compiling the Basset force into the coupling interface with Visual C, a dynamic mathematical model is set up to describe the upward motion behavior of a single bubble by adopting the CFD-DEM method. Afterwards, the coupling interface with Basset force proposed in this study is verified experimentally and shows very good agreements. The initial velocity, releasing depth, bubble size, density ratio and viscosity ratio are studied qualitatively due to their great importance to Basset force. The ratio of Basset force to the sum of Basset force and drag force and to buoyancy, ${\vec{F}}_{B a}$ /( ${\vec{F}}_{D}$ + ${\vec{F}}_{B a}$ ) and \| ${\vec{F}}_{B a}$ / ${\vec{F}}_{B}$ \|, are employed to quantify the contribution of Basset force quantitatively. In addition, some instructive outlooks and recommendations on a further development of appropriate and justifiable use of Basset force are highlighted at last.

Keywords:	Basset force CFD-DEM bubble unsteady force

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