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《Chinese Journal of Applied Mechanics》 2002-02
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Progresses and Applications of Basset Force

You Changfu Qi Haiying Xu Xuchang (State Key Lab. Of Clean Combustion of Coal, Tsinghua University, Beijing 100084)  
Basset force is an unsteady force on a particle due to acceleration of relative velocity between particle and fluid. Different authors have carried out a lot of experimental, theoretical and numerical investigations. Investigations on Basset force are reviewed and summarized in the present paper. For different types of two phase flow, there are some characteristics estimating Basset force on a particle. For the bubble liquid two phase flow, the Basset force can be neglected when the perturbation frequency of the fluid flow is small or large value. For liquid (or solid) particle gas two phase flow, neglecting Basset force is reasonable. But for other two phase flows, the magnitude of Basset force is determined by some actual conditions, such as the particle size, ratio of the fluid density to the particle, the flow characteristic time and the relaxation time of the particle, acceleration of relative velocity, etc. Developing directions of further investigation on Basset force have also been discussed in the paper.
【Fund】: 国家重点基础研究专项经费资助 (No .G19990 2 2 2 )
【CateGory Index】: O359
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