论文部分内容阅读
研究由无限稀薄的靶粒子散布于有限浓度 (体积分数为)的主粒子悬浮液中而组成的二分量带电胶体系统 ,计算了靶粒子的短时间平动和转动自扩散系数 .当系统中的粒子浓度和电解质浓度都不太高时 ,只考虑流体力学相互作用对扩散张量的首项两体贡献 .为了计算体系的对分布函数 ,在数值计算的基础上发展了一个等效硬球模型 ,近似地把主粒子和靶粒子看作等效半径为δEHS的相同硬球粒子 .结果表明 ,靶粒子的自扩散系数随两种粒子尺寸比和主粒子体积分数变化的关系可以很好地用等效硬球模型来解释
A two-component charged colloidal system consisting of an infinitely thin target particle dispersed in a suspension of a master particle at a finite concentration (volume fraction) was studied, and the short-time translational and rotational self-diffusion coefficients of the target particle were calculated. Only consider the contribution of the hydrodynamic interaction to the first two-body contribution of the diffusion tensor.In order to calculate the distribution function of the system, an equivalent hard-sphere model is developed on the basis of numerical calculation , The main particles and the target particles are approximately regarded as the same hard-sphere particles with the equivalent radius δEHS.The results show that the self-diffusion coefficient of the target particles can be well used as the relationship between the two particle size ratios and the variation of the main particle volume fraction Efficient hardball model to explain