化生颗粒在人体微通道内悬浮运动的数值模拟研究

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.

Numerical simulation of chemico-biological particles transportation inside human micropassage

Objective To investigate the transportation of chemico-biological particles(CBP) through the micropassage inside the human body in order to improve chemico-biological protection.Methods Dissipative particle dynamics (DPD) method was used to study CBP transportation through micropassages inside the human body.Results The Poiseuille flow could be ensured by imposing boundary conditions including pressure gradient and no-slip.The axial velocity between fluid particles and CBPs was well matched except the area close to the passage wall.However, CBPs tended to accumulate and the density of CBPs slightly increased, leading to the jam effect and producing particle accumulation.Conclusion The characteristic of CBP transportation is better understood,which can help develop some chemico-biological protection devices according to movement of CBPs and improve the performance of CBPs during chemico-biological protection.