کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
659089 | 1458093 | 2012 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental investigations of laminar, transitional and turbulent Gas flow in microchannels
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper presents experimental results on flow characteristics of laminar, transitional and turbulent gas flows through microchannels. The experiments were performed for three microchannels etched into silicon wafers, capped with glass with hydraulic diameters of 69.48, 99.36 and 147.76 μm. The stagnation pressure was designated in such a way that the flow is laminar, transitional and turbulent with the outflow at atmosphere condition. The pressure was locally measured at seven locations along the channel length to determine local values of Mach number and friction factor from laminar to turbulent flow. The result shows f â
 Re is a function of Mach number and is higher than incompressible value due to the compressibility effect for laminar flow. The Darcy friction factor with flow acceleration loss is higher than the Fanning friction factor for both laminar and turbulent flow. The friction factors were also compared with empirical correlations in the literature and Moody's chart.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 55, Issues 15â16, July 2012, Pages 4397-4403
Journal: International Journal of Heat and Mass Transfer - Volume 55, Issues 15â16, July 2012, Pages 4397-4403
نویسندگان
Chungpyo Hong, Toru Yamada, Yutaka Asako, Mohammad Faghri,