کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7050094 | 1457163 | 2013 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Novel thermophoretic particle separators: Numerical analysis and simulation
ترجمه فارسی عنوان
جداسازهای ذرات گرماسنجی جدید: تجزیه و تحلیل عددی و شبیه سازی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In this paper, it is shown that thermophoresis is a viable method for precise particle separation (sieving) and manipulation in microchannels. To do so, thermophoresis force acting on particles suspended in air and water flowing in a microchannel heated from below are simulated and relative magnitude and difference of thermophoresis force acting on a particle in a gas and liquid is discussed, discerned and elucidated. To show the potential of thermophoresis to serve as a sieve, transport equations for suspension of polystyrene in water and gold particles in air are solved numerically, both in the absence and presence of gravity. In simulations, particles are considered as a discrete phase and their trajectories are tracked using a Lagrangian approach. It is shown that thermophoresis can be used to separate macromolecules and particles from a water stream in a microchannel with one inlet and two outlets. Also, it is demonstrated that thermophoresis can be used as a means to separate multiple particle streams with different characteristics such as size and density from a gas flowing in a microchannel. Two microchannel geometries were numerically analyzed and it is shown that in both cases particles with different sizes are forced to exit through a different outlets. This effect can be used to separate, concentrate, manipulate, trap, target and transfer macromolecules such as bio-molecules and DNA in a microchannel. The correct application of thermophoresis theory in a gas and liquid is elucidated throughout the simulations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 59, Issues 1â2, 25 September 2013, Pages 527-534
Journal: Applied Thermal Engineering - Volume 59, Issues 1â2, 25 September 2013, Pages 527-534
نویسندگان
Morteza Eslamian, M. Ziad Saghir,