کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7058882 | 1458078 | 2013 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Lattice Boltzmann simulation for dropwise condensation of vapor along vertical hydrophobic flat plates
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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
Using the improved double distribution function (DDF) thermal Lattice Boltzmann method (LBM), dropwise condensation of dry saturated vapor at a cold spot on vertical hydrophobic flat plates under gravity effects are simulated numerically for the first time. Dynamic behaviors of periodic formation of 3D condensing droplets on a 2D cold spot at a constant subcooled temperature, and their subsequent growth, and movement on hydrophobic surfaces are studied. The size of detached droplet on hydrophobic surfaces with different wettabilities under various gravity forces are simulated, and the results are found in good agreement with existing analytical predictions. The induced transient velocity and temperature fields and the variation of dropwise condensation heat flux with time at the cold spot on hydrophobic surfaces are analyzed. It is found that both the period of droplet condensation and its maximum heat transfer rates decrease as the contact angle of the surface is increased.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 64, September 2013, Pages 1041-1052
Journal: International Journal of Heat and Mass Transfer - Volume 64, September 2013, Pages 1041-1052
نویسندگان
Xiuliang Liu, Ping Cheng,