Experimental investigation of non-stationary motion of single small spherical particles in an upward flow with different velocities
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This experimental investigation focuses on carefully determining the drag coefficient of single spherical particles with considerable small diameters in non-stationary motion. A low-speed wind tunnel and a set of high-speed photography system are employed to confirm the displacement of each particle from its trajectory. Moreover, spherical particles of two different densities are used and the minimum diameter of these particles reaches 0.1mm. Meanwhile, the Basset force generated fromthe relative acceleration in the gas-particle flow is calculated approximately. The experimental results show that themaximumproportion of Basset force does not exceed 2.2%. In addition, the relationship of CD - Re for the experimental data is also determined. This research offers fundamental experimental results for industrial applications and also contributes to the research of nonstationary gas-particle flow.
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