EFFECT OF WAVY WALL ON CONVECTION HEAT TRANSFER OF WATER-AL2O3 NANOFLUID IN A LID-DRIVEN CAVITY USING LATTICE BOLTZMANN METHOD
محل انتشار: ماهنامه بین المللی مهندسی، دوره: 25، شماره: 2
سال انتشار: 1390
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 860
فایل این مقاله در 11 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_IJE-25-2_006
تاریخ نمایه سازی: 17 خرداد 1393
چکیده مقاله:
In the present study, the effects of wavy wall’s properties on mixed convection heat transfer of Water-Al2O3 Nanofluid in a lid-driven cavity are investigated using the Lattice Boltzmann Method(LBM). The Boundary Fitting Method with second order accuracy at both velocity and temperaturefields is used to simulate the curved boundaries in the LBM. The problem is investigated for differentRichardson numbers ( 0.1 Ri 10 ), volume fractions of nanoparticles ( 0.01 0.05 ), curveamplitudes ( 0.05 A 0.25 ) and phase shifts of corrugated wall ( 0 270 ) when the Reynoldsnumber is equal to 25. The results represent the effective role of corrugated wavy wall on the rate of nanofluid heat transfer. It is observed that increasing the wavy wall’s amplitude leads to a decrease in the average Nusselt number in high Richardson number. It is found that increasing the volume fraction ofnanoparticles enhances the rate of heat transfer. Results also show that adding nanoparticles to the base fluid has significant effects on both fluid flow and temperature field of the mixed convection, especially for low Richardson number
کلیدواژه ها:
نویسندگان
m jafari
Department of Mechanical Engineering, Babol University of Technology, Postal Code: ۴۸۴, Babol, Iran
m farhdi
Department of Mechanical Engineering, Babol University of Technology, Postal Code: ۴۸۴, Babol, Iran
k sedighi
Department of Mechanical Engineering, Babol University of Technology, Postal Code: ۴۸۴, Babol, Iran
e fattahi
Department of Mechanical Engineering, Babol University of Technology, Postal Code: ۴۸۴, Babol, Iran