Calculations of Local Electric Field in a Mixture by the Modified Dipole-enhanced Approximation

This paper presents a modified dipole-enhanced approximation to calculate the local electric field in a mixture of high volume fraction of sphere particles.The results are compared with those obtained through the finite-element method and dipole model method.When there is a small dielectric mismatch between the particles and the environment,there is not an obvious difference among these methods,except the dipole approximation in the area of the maximum electric field strength.When the dielectric mismatch is large,the calculated results of the modified dipole-enhanced approximation are not very good at the surface of the sphere,but is fairly good in the most part of the area,especially in the area of the maximum electric field strength,the dipole approximation breaks down in the entire field.It means that the modified dipole-enhanced approximation is simple and acceptable.