کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6467162 1423248 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrokinetically induced thermofluidic transport of power-law fluids under the influence of superimposed magnetic field
ترجمه فارسی عنوان
انتقال الکتروکینتیک ترموفولیئید از مایعات قدرت قانون تحت تاثیر میدان مغناطیسی سوار شده
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


- Thermal transport of non-Newtonian fluid in narrow fluidic confinements.
- Combined effects of interfacial electrokinetics, rheology, and superimposed magnetic field.
- Thermofluidic transport phenomena and entropy generation.
- Effects of the magnetic field on streaming potential and heat transfer.

This paper presents a theoretical analysis of non-Newtonian (power-law obeying) fluid in a narrow confinement subjected to the combined consequences of interfacial electrokinetics, rheology, and superimposed magnetic field. We devote special attention on the exploitation of magnetic field and power-law exponent, in the development of induced streaming potential and thermofluidic energy transfer characteristics over small scales. In an effort to do so, going beyond the Debye-Hückel limit, we first derive an expression for streaming potential by invoking the consequences of strong EDL (electrical double layer) interactions in the narrow fluidic passage and finite conductance of the Stern layer. In particular, we solve thermal energy transport equation with an illustrative case of classical uniform wall heat flux boundary and considering the volumetric heat generation effects due to viscous dissipation as well as Joule heating. Our results demonstrate that the applied magnetic field imparts a retarding influence on the induced streaming potential development, whereas, it results in enhancement of heat transfer rate. Moreover, additional influences of power law index show reduction in heat transfer as well as the streaming potential magnitude. We unveil the optimal combinations of power law index and the magnetic field which lead to the minimization of the global total entropy generation in the system. We believe that theoretical results presented in this research will be useful in the development of novel narrow fluidic energy efficient devices under electrokinetic modulation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 171, 2 November 2017, Pages 391-403
نویسندگان
, , ,