Calculation of particle concentration in the problem of aerosol aspiration into a thin-walled tube
Calculation of particle concentration in the problem of aerosol aspiration into a thin-walled tube
复制标题
气溶胶吸入薄壁管问题中的颗粒浓度计算
DOI：
10.1134/s0015462809060106
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发表时间：
2009
期刊：
影响因子：
0.9
通讯作者：
D. Maklakov
中科院分区：
文献类型：
--
作者：
A. K. Gil’fanov;S. Zaripov;D. Maklakov
建立了气溶胶从运动气体吸入薄壁管内问题的数学模型，并计算了颗粒浓度场。在没有颗粒对气体流动影响的情况下，用边界元和有限体积法计算不可压缩气体的势流和粘性流近似下的载体介质。对于粘性流动模型，用FLUENT程序进行了数值求解。颗粒运动方程补充了计算沿颗粒轨迹的浓度的方程。研究了不同风速比和不同斯托克斯数下取样器内和附近颗粒浓度的空间分布。讨论了颗粒浓度分布不均匀对吸气系数的影响。
A mathematical model of the problem of aerosol aspiration into a thin-walled tube from a moving gas is developed and particle concentration fields are calculated. In the absence of a particle effect on the gas flow, the carrier medium is calculated in the potential-flow and viscous-flow approximations for an incompressible gas, using boundary-element and finite-volume methods. For the viscous-flow model, a numerical solution is found using the FLUENT program. The particle motion equations are complemented with equations for calculating the concentration along the particle trajectories. The spatial distributions of the particle concentration near and inside the sampler are studied for different ratios of the wind and aspiration velocities and for different Stokes numbers. The effect of nonuniformity of the particle concentration distributions on the aspiration coefficient is discussed.