کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
652962 1457484 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bubble confinement and deformation during flow boiling in microchannel
ترجمه فارسی عنوان
محفظه حباب و تغییر شکل در جریان جوش در میکرو کانال ☆
کلمات کلیدی
سلول حباب؛ دیوار محصور نیروی؛ جریان جوش؛ میکرو کانال
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی

The bubble dynamics during subcooled flow boiling were investigated in a single rectangular cross-section (0.5 mm × 1 mm) microchannel. Degassed deionized water was used as the working fluid with the confined bubble behavior observed using a high-speed CCD camera. The microchannel wall confines the bubble growth in the bubble height direction when the bubble departure diameter was larger than the microchannel cross section, resulting in strong deformation of the bubble top interface even before the liquid–vapor interface touched the microchannel wall. The microchannel confinement effect works by exerting a wall confining force on the top interface of the growing bubble. The negative feedback between the velocity of the top interface and the wall confining force is the main reason for the fluctuations in the increasing maximum local void fraction and the bubble aspect ratio during the confined bubble growth period.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Communications in Heat and Mass Transfer - Volume 70, January 2016, Pages 47–52
نویسندگان
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