Singh P, Aubry N
Department of Mechanical Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102, USA.
Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Jul;72(1 Pt 2):016602. doi: 10.1103/PhysRevE.72.016602. Epub 2005 Jul 5.
The point dipole (PD) model is routinely used for estimating the dielectrophoretic (DEP) force acting on a particle placed in the nonuniform electric fields of dielectrophoresis devices, such as square cages. We show that if the particle size is much smaller than the dielectrophoretic cage size, the PD model accurately approximates the actual DEP force, computed numerically using the Maxwell stress tensor method. However, when the two sizes are comparable, the actual DEP force differs significantly in both magnitude and direction from that given by the PD model.
点偶极子（PD）模型通常用于估计作用于置于介电泳装置（如方形笼）非均匀电场中的粒子上的介电泳（DEP）力。我们表明，如果粒子尺寸远小于介电泳笼尺寸，PD模型能准确近似使用麦克斯韦应力张量方法数值计算得到的实际DEP力。然而，当这两个尺寸可比时，实际DEP力在大小和方向上与PD模型给出的力有显著差异。
