کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
657834 1458065 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simulation of droplet spreading on porous substrates using smoothed particle hydrodynamics
ترجمه فارسی عنوان
شبیه سازی پراکندگی قطرات بر روی سطوح متخلخل با استفاده از هیدرودینامیک ذرات نرم شده
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی

Small-scale fluid phenomena are being studied in many areas of engineering and research. This article focuses on small-scale droplet spreading and absorption on a porous substrate based on the SPH (Smoothed Particle Hydrodynamics) method. Three main factors that affect this process were considered: contact angle, pore sizes and gravity. Three various intrinsic contact angles, two different pore sizes with same porosity in comparison with flat surface and four different gravity conditions (g = 0 m/s2 included) were applied to simulate the droplet spreading on porous substrates. The results show that the dependence of wetting region radius on time for both flat and porous substrates can be well divided into two spreading stages, i.e. a power-law inertial stage and viscous stage. To illustrate the counterbalance between droplet spreading and absorption, the evolution of liquid drop height was also examined, which indicates that the drop height decreases, while the wetting region radius increases as intrinsic contact angle decreases for both pore sizes. Besides that the effect of gravity on droplet spreading dynamics is also presented.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 77, October 2014, Pages 828–833
نویسندگان
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