کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4995162 1458701 2017 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Internal flow and heat transfer in a droplet located on a superhydrophobic surface
ترجمه فارسی عنوان
جریان داخلی و انتقال گرما در یک قطره بر روی یک سطح سوپر هیدروافوبی قرار دارد
کلمات کلیدی
قطره، جریان داخلی، هیدروفلوئید انتقال گرما، پلی کربنات بافت مارانگونی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Flow and heat transfer inside a droplet located on a superhydrophobic surface are examined for various droplet contact angles. A polycarbonate wafer is immersed into a liquid acetone for 6 min to crystallize wafer surface generating a surface texture consisting of micro/nano pillars. To reduce the surface energy of textured polycarbonate wafer, octadecylichlorosilane coating is applied, which results in the superhydrophobic characteristics of the surface. A water droplet is formed on the superhydrophobic surface and it is heated from a constant heat source at the droplet bottom. The metallic powders consisting of Inconel 718 alloy with a nominal diameter of 30 μm are sprayed at the superhydrophobic polycarbonate surface to establish foundations for a constant temperature heating of the droplet. It is found that the averaged Nusselt and the Bond numbers increase with increasing droplet contact angle. A new number, Ayse, is introduced to correlate the Bond number and the droplet contact angle, which is then used to develop the relation between the Nusselt number and the Ayse number. The Nusselt number increases with increasing Ayse number in the form of a power relation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Thermal Sciences - Volume 121, November 2017, Pages 213-227
نویسندگان
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