直微通道中的电黏性效应
发布时间：2018-10-21 10:57
【摘要】：为了研究直微通道中幂律流体的电黏性效应,建立了压力驱动微通道内流体流动的数学模型,其中双电层电势分布、流体流动及流动粒子输运特性分别由Poisson-Boltzmann(P-B)方程、Navier-Stokes(N-S)方程及Nernst-Plank(N-P)方程描述。讨论了微通道中有电黏性效应时溶液浓度;幂律指数对微通道内流体的速度分布、流动电场强度的影响。结果表明:对于n1的剪切变稀流体,流体的黏度和流动速度随着n的增大而减小,变化非常明显;而对于n1的剪切变稠流体,黏度和流动速度几乎不受n的影响,在实际应用中可以忽略不计。
[Abstract]:In order to study the electric viscosity effect of power law fluid in a straight microchannel, a mathematical model of the fluid flow in a pressure driven microchannel is established, in which the potential distribution of the double layer is obtained. The characteristics of fluid flow and particle transport are described by Poisson-Boltzmann (P-B) equation, Navier-Stokes (N-S) equation and Nernst-Plank (N-P) equation, respectively. The effects of solution concentration and power law exponent on the velocity distribution and flow electric field intensity in microchannels with electrically viscous effect are discussed. The results show that the viscosity and velocity of the fluid decrease with the increase of n for the shear thinning fluid n 1, but the viscosity and flow velocity are almost independent of n for the shear thickened fluid n 1, and for the shear thickened fluid n 1, the viscosity and flow velocity of the fluid decrease with the increase of n. It can be ignored in practical application.
【作者单位】： 南昌大学机电工程学院;南昌大学信息工程学院;
【基金】：国家自然科学基金项目(11302095)资助
【分类号】：TN492;O35
，
本文编号：2284897
[Abstract]:In order to study the electric viscosity effect of power law fluid in a straight microchannel, a mathematical model of the fluid flow in a pressure driven microchannel is established, in which the potential distribution of the double layer is obtained. The characteristics of fluid flow and particle transport are described by Poisson-Boltzmann (P-B) equation, Navier-Stokes (N-S) equation and Nernst-Plank (N-P) equation, respectively. The effects of solution concentration and power law exponent on the velocity distribution and flow electric field intensity in microchannels with electrically viscous effect are discussed. The results show that the viscosity and velocity of the fluid decrease with the increase of n for the shear thinning fluid n 1, but the viscosity and flow velocity are almost independent of n for the shear thickened fluid n 1, and for the shear thickened fluid n 1, the viscosity and flow velocity of the fluid decrease with the increase of n. It can be ignored in practical application.
【作者单位】： 南昌大学机电工程学院;南昌大学信息工程学院;
【基金】：国家自然科学基金项目(11302095)资助
【分类号】：TN492;O35
，
本文编号：2284897
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