Particle behavior in the turbulent boundary layer of a dilute gas-particle flow past a flat plate
Particle behavior in the turbulent boundary layer of a dilute gas-particle flow past a flat plate
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DOI：
10.1016/j.expthermflusci.2005.09.005
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发表时间：
2006-05
影响因子：
3.2
通讯作者：
Jun Wang;E. Levy
中科院分区：
文献类型：
--
作者：
Jun Wang;E. Levy
利用微型光纤探针对1.5m长平板湍流边界层内的颗粒行为进行了实验研究，并利用CFD软件进行了数值模拟。实验结果表明，颗粒浓度分布不均匀，浓度峰值出现在湍流边界层内。边界层内的颗粒浓度增加，峰值的位置发生在靠近壁的颗粒尺寸的增加。这种现象被认为与滑移剪切升力（Saffman力）和颗粒-壁面相互作用有关。结果表明，边界层内颗粒速度大于空气速度，颗粒速度随固体含量和粒径的增大而增大。
Particle behavior in the turbulent boundary layer of a dilute gas-particle flow past a 1.5m long flat plate was studied experimentally using a miniature fiber optic probe, and numerically using CFD software. The experimental results show a non-uniform distribution of particle concentration with the peak concentration value inside the turbulent boundary layer. The particle concentration inside the boundary layer increased and the location of the peak value occurred closer to the wall as particle size increased. This phenomenon is believed to be related to the slip-shear lift force (Saffman force) and particle–wall interactions. The results show the particle velocity is larger than the air velocity in the boundary layer, and it increases with an increase in solids loading and particle size.