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目的研究化生颗粒(CBP)在人体微通道内悬浮运动特性,以提高化生防护技术水平。方法应用耗散粒子动力学(DPD)方法研究人体微通道内CBP的运动特性。结果通过在模型内施加压力梯度和采用无滑移边界条件等方法,可确保模型内流体达到理想的Poiseuille流动状态。除在通道壁面附近外,连续相颗粒速度和CBP速度均匹配较好。在受约束通道的近壁面区域,CBP趋向于聚集,其浓度有轻微的增加,最终这种约束会引起阻塞效应,从而产生颗粒聚集现象。结论掌握了CBP在人体微通道内的悬浮运动特性,针对CBP的运动特点,可有针对性地研制CBP过滤防护装置,系统提升我军化生防护技术水平。
Objective To study the suspension kinetic characteristics of chemical particle (CBP) in human microchannel to improve the level of chemical protection. Methods Dissociative particle dynamics (DPD) method was used to study the movement characteristics of CBP in human microchannels. Results By applying pressure gradients within the model and using non-slip boundary conditions, it is possible to ensure that the fluid in the model achieves the desired Poiseuille flow regime. Except near the channel wall, the continuous phase particle velocity and CBP velocity match well. CBP tends to aggregate in the near-wall region of the confined channel with a slight increase in concentration, eventually resulting in a blockage effect resulting in particle agglomeration. CONCLUSIONS The CBP traversal characteristics in human microchannels are mastered. According to the movement characteristics of CBP, CBP filter protection devices can be developed in a targeted manner to improve the technical level of CBP protection.