کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7051436 | 1457377 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of key factors on the heat and mass transfer of a sessile droplet
ترجمه فارسی عنوان
تأثیر عوامل کلیدی بر انتقال حرارت و جرم یک قطره سفت و محکم
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Heat transfer, temperature and velocity fields of droplets of water and aqueous salt solutions have been studied. The initial concentration of salt solutions C01â¯=â¯30% in accordance with advanced technological applications. It is shown that the heat flux q for a water droplet is several times higher than for salt solutions. During the droplet evaporation, this difference increases, since q for aqueous salt solutions is many times reduced. While maintaining the wall temperature under the drop quasi-constant (Twâ¯=â¯83â¯Â°C), the heat transfer coefficient α (for the time tâ¯<â¯150â¯s) for a drop of water 1.5-2 times exceeds α for the salt solution, and is 7 times higher for water than for the salt solution at tâ¯=â¯280â¯s. Using PIV measurements the liquid velocity fields have been obtained; and for the first time it has been shown that only for very small times and at high ÎT, the important role is played by thermo-gravitational convection in the droplet (the Rayleigh number Ra). But already for tâ¯>â¯10â¯s, the thermal and solutal Marangoni flows have a greater influence on the flow in a drop of the salt solution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 99, December 2018, Pages 59-70
Journal: Experimental Thermal and Fluid Science - Volume 99, December 2018, Pages 59-70
نویسندگان
R.S. Volkov, P.A. Strizhak, S.Y. Misyura, S.I. Lezhnin, V.S. Morozov,