کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
662139 1458180 2005 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bubble separation and collision on thin wires during subcooled boiling
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Bubble separation and collision on thin wires during subcooled boiling
چکیده انگلیسی

An experimental investigation was conducted to observe bubble separation and collision phenomena during subcooled boiling of water on heating wires, and a theoretical model was proposed to describe the associated dynamical phenomena and understand the physical significance. Both experimental and theoretical evidences indicate that interfacial thermocapillary force induced by temperature difference and their interaction between neighbor bubbles was the most important forces during bubble separation and collision. The bubble separation process with positive effectual viscosity can be divided into two stages, accelerating and decelerating stage. The collision with an immobile bubble was concluded as an elastic collision, and the two equivalent bubbles just exchanged their momentum during their collision. Bubbles coalescence characteristics were also analyzed using the collision dynamics. The theoretical conclusions were compared with experimental results, showing a reasonable agreement with each other.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 48, Issues 23–24, November 2005, Pages 4726–4737
نویسندگان
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