کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
973783 1480147 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Molecular dynamics study of an electro-kinetic fluid transport in a charged nanochannel based on the role of the stern layer
ترجمه فارسی عنوان
مطالعه دینامیک مولکولی یک انتقال الکتریکی جنبشی مایع در یک نانوکانال با بارگیری بر اساس نقش لایه استرن
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
چکیده انگلیسی


• Effects of electric field and temperature are studied on the electro-osmotic flow.
• The electro-osmotic velocity is a fourth order function of the electric field.
• The electro-osmotic velocity changes linearly with temperature.
• An increase in the studied parameters leads to a reduction in stern layer capacity.
• The stern layer capacity reduction delays the charge inversion phenomenon.

Electro-osmotic flow of an aqueous solution of NaCl has been studied using the molecular dynamics simulation. The main objective of this work is to investigate the effects of the electric field and temperature on the flow properties considering the role of the stern layer. By increasing any of the mentioned parameters, the electro-osmotic velocity grows. It is found that the electro-osmotic velocity is a fourth order function of the electric field, while it changes linearly with temperature. Similar trends of change are found for the EDL thickness. By an increase in the studied parameters, a reduction in the stern layer capacity is observed. In this situation, more moving ions are located in the diffuse layer, which are dragging other particles. This is one of the causes that increase the electro-osmotic velocity, a matter which was not predicted by previous researches. A consequence of the stern layer capacity reduction is that in the systems under the influence of higher temperatures or stronger electric fields, charge inversion phenomenon occurs at higher wall charges.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 426, 15 May 2015, Pages 25–34
نویسندگان
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