کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
724802 892429 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrically forced microthreading of highly viscous dielectric liquids
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Electrically forced microthreading of highly viscous dielectric liquids
چکیده انگلیسی

The behaviour of three high viscosity (4875, 12 125 and 58 560 mPa s), dielectric liquids was investigated at flow rates of 10−10, 10−12 and 10−14 m3 s−1 and the applied voltage range 6–15 kV. In these experiments, due to the low electrical conductivity of the liquids (10−13 S m−1) and therefore the ensuing high electrical relaxation time, classical electrohydrodynamic atomization conditions are not satisfied. Only dripping and unstable jetting were observed at 4875 mPa s. A transition from no jetting to stable microthreading was observed for the 12 125 and 58 560 mPa s samples. The relics accompanying the transition were found to change from discrete droplets to a continuous filament. Stable microthreading, which generates uniform filaments, was obtained for the 12 125 mPa s sample at flow rates 10−10 and 10−12 m3 s−1 and in the case of the 58 560 mPa s sample at all the flow rates investigated. The high viscosity assisted stable microthreading with the filament diameter decreasing with increasing applied voltage and more dramatically decreasing with reducing flow rate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electrostatics - Volume 64, Issue 6, June 2006, Pages 355–360
نویسندگان
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