McConnell Lane C, Vlahovska Petia M, Miksis Michael J
Department of Math and Statistics, University of New Mexico, Albuquerque, NM 87131, USA.
Soft Matter. 2015 Jun 28;11(24):4840-6. doi: 10.1039/c5sm00585j. Epub 2015 May 20.
We computationally investigate the dynamics of a vesicle exposed to uniform DC or AC electric fields. We employ the two-dimensional boundary integral method in order to simulate vesicle deformation under experimental conditions where peculiar drum-like ("squared") shapes have been observed. The vesicle membrane is modeled as an infinitely thin, capacitive, area-incompressible interface, with the surrounding fluids acting as leaky dielectrics. Our simulations capture the "squaring" phenomenon, in which vesicles deform into rectangular profiles with corner-like regions of high curvature, as vesicles undergo dynamic transitions between oblate and prolate ellipsoidal shapes.
我们通过计算研究了暴露于均匀直流或交流电场中的囊泡的动力学。我们采用二维边界积分方法，以便在观察到特殊鼓状（“方形”）形状的实验条件下模拟囊泡变形。囊泡膜被建模为无限薄的、电容性的、面积不可压缩的界面，周围流体作为漏电介质。我们的模拟捕捉到了“变方”现象，即囊泡在从扁球形到长球形的动态转变过程中，变形为具有高曲率角状区域的矩形轮廓。
