Numerical study on electrophoretic motion of hydrophobic nano-cylinder particles

  • سال انتشار: 1400
  • محل انتشار: نوزدهمین کنفرانس دینامیک شاره ها
  • کد COI اختصاصی: CFD19_067
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 481
دانلود فایل این مقاله

نویسندگان

Ali Shafiei Souderjani

MSc. Student, Sharif University of technology, Tehran

Mostafa Bakouei

MSc. Graduate, Sharif University of technology; Tehran

Mohammad Hassan Saidi

Professor, Sharif University of technology, Tehran

Mojtaba Taghipoor

Assistant professor, Sharif University of technology, Tehran

Siamak Kazemzadeh Hannani

Professor, Sharif University of technology, Tehran

چکیده

Electrophoresis of nanoparticles due to its wide range of applications like separation of bioparticle and drug delivery has a crucial role in Micro andNanofluidics. In the conventional theory of electrokinetic phenomena, a no-slip boundary condition is assumed for the surface of a movingparticle. But the no-slip condition is only valid when there is a strong bond between molecules of a particle and electrolyte solution. In other cases, the Navierslip condition replaces the no-slip condition as the proper choice for the particle’s boundary condition. In this paper, we investigated the effect of ahydrophobic surface on the electrophoretic motion of a cylindrical nanoparticle. PNP-NS equations with modified boundary conditions and a wide range ofslip length, surface charge density, and concentration of electrolyte solution were solved numerically. For each point, electric and hydrodynamic stresses were calculated, and the particle’s mobility was obtained through an iterative method. According to the results, in all cases, by enhancing slip length, theelectrophoretic mobility increases, and the hydrodynamic stress decreases. Because of the conductance effect, the influence of hydrodynamicslip in particles with a thick electric double layer ismore significant than particles with a thin electric double layer. Also, our study showed that byincreasing concentration of electrolyte, electrophoretic mobility of hydrophobic nanocylinder particles reduces.

کلیدواژه ها

Electrophoresis,Hydrophobicity, Cylindrical, nanoparticle, Electric double layer, Numerical simulation

مقالات مرتبط جدید

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.