کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
658717 | 1458089 | 2012 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Incipience of boiling on a wire
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
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چکیده انگلیسی
The initial steps in the process of vaporisation of ethyl alcohol around a heated micrometric platinum wire are presented. A constant heat flux is imposed during a few milliseconds in the wire, elevating in turn the liquid temperature well above its saturation temperature until the first bubble is observed and expands before possibly collapsing. The bubble dynamics is tracked by high speed imaging as well as by acoustic emission during the bubble growth. We show that this nucleation process occurs for a fixed temperature Tâ=465Â K (i.e. 114Â K above saturation). The maximum volume and lifetime of this primary bubble are predicted by considering the energy budget between the amount of specific energy stored in the liquid and the latent heat consumed during the vaporisation process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 55, Issues 23â24, November 2012, Pages 6881-6889
Journal: International Journal of Heat and Mass Transfer - Volume 55, Issues 23â24, November 2012, Pages 6881-6889
نویسندگان
Jean-Charles Nardin, Cédric Poulain, Jérôme Duplat,