Effect of using nano-encapsulated phase change material on drag coefficient and temperature in a square cylinder
محل انتشار: بیست و نهمین همایش سالانه بین المللی انجمن مهندسان مکانیک ایران و هشتمین همایش صنعت نیروگاه های حرارتی
سال انتشار: 1400
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 297
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شناسه ملی سند علمی:
ISME29_306
تاریخ نمایه سازی: 13 تیر 1400
چکیده مقاله:
In the present paper, a two-dimensional model for investigating thermal and hydrodynamic characteristics of a square cross-section cylinder with nano-encapsulated phase change material (NEPCM) as the coolant is studied. Continuity, momentum and energy equations are solved using finite volume method based on SIMPLE algorithm. Base fluid and NEPCM particles material are pure water and n-octadecane with an average diameter of ۱۰۰ nm and melting range of ۱۰ K, respectively. Coolant flow is steady and laminar, while the square cylinder emits a constant heat flux of ۲۵۰۰ W/m۲ into the fluid around it. Effects of NEPCM particles volume fraction in the range of ۰% to ۲۰% and Reynolds numbers ranging from ۵ to ۴۰ on Nusselt number, drag coefficient and local cylinder temperature are studied. Results show that utilization of NEPCM particles increases Nusselt number and decreases local cylinder temperature. These nanoparticles slightly increase drag coefficient. With enhancing Reynolds number, Nusselt number increases for both base fluid and NEPCM slurry. Additionally, it is found that local temperature of cylinder and drag coefficient are inversely related to Reynolds number
کلیدواژه ها:
نویسندگان
Farzad Bazdidi-Tehrani
Professor, School of Mechanical Engineering, Iran University of Science and Technology, Tehran
Armin Ebrahimi
M.Sc. student, School of Mechanical Engineering, Iran University of Science and Technology, Tehran
Roghayeh Azimi Souran
Ph.D. candidate, School of Mechanical Engineering, Iran University of Science and Technology, Tehran