کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
816066 906432 2016 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical investigation of pure mixed convection in a ferrofluid-filled lid-driven cavity for different heater configurations
ترجمه فارسی عنوان
بررسی عددی مخروطی مخلوط خالص در یک حفره ریزساختار پر شده با فروسرخ برای تنظیم کننده های مختلف بخاری
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی
Mixed convection has been a center point of attraction to the heat transfer engineers for many years. Here, pure mixed convection analysis in cavity is carried out for two different geometric heater configurations under externally applied magnetic field. Ferrofluid (Fe3O4-water) is considered as working fluid and modeled as single phase fluid. The heaters at the bottom wall are kept at constant high temperature while vertical side walls are adiabatic. The top wall is moving at a constant velocity in both geometric configurations and is kept at constant low temperature. Galerkin weighted residuals method of finite element analysis is implemented to solve the governing equations. The analysis has been carried out for a wide range of Richardson number (Ri = 0.1-10), Reynolds number (Re = 100-500), Hartmann number (Ha = 0-100) and solid volume fraction (φ = 0-0.15) of ferrofluid. The overall heat transfer performance for both the configurations is quantitatively investigated by average Nusselt number at the heated boundary wall. It is observed that higher Ri enhances the heat transfer rate, although higher Ha decreases heat transfer rate. Moreover, at higher Ri and lower Ha, semi-circular notched cavity shows significantly better (more than 30%) heat transfer rate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Alexandria Engineering Journal - Volume 55, Issue 1, March 2016, Pages 127-139
نویسندگان
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