Effects of Different Wall Shapes on Thermal-Hydraulic Characteristics of Different Channels Filled with Water Based Graphite-SiO2 Hybrid Nanofluid

Processes - Tập 9 Số 7 - Trang 1253
Yacine Khetib1,2, Ahmad Aziz Alahmadi3, Ali Alzaed4, Ahmad Tahmasebi5, Mohsen Sharifpur6,7, Goshtasp Cheraghian8
1Center Excellence of Renewable Energy and Power, King Abdulaziz University, Jeddah, 80204, Saudi Arabia
2Mechanical Engineering Department, Faculty of Engineering, King Abdulaziz University, Jeddah 80204, Saudi Arabia
3Department of Electrical Engineering, College of Engineering, Taif University, Taif 21944, Saudi Arabia
4Architectural Engineering Department, Faculty of Engineering, Taif University, Taif 21944, Saudi Arabia;
5Independent Researcher, Dubai 999041, United Arab Emirates
6Department of Mechanical and Aeronautical Engineering, University of Pretoria, Hatfield 0028, South Africa
7Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 404, Taiwan
8Technische Universität Braunschweig, 38106, Braunschweig, Germany

Tóm tắt

In the current numerical study, various wall shape effects are investigated on the thermal-hydraulic characteristics of different channels filled with water-based graphite-SiO2 hybrid nanofluid. In this work, the performance evaluation criteria (PEC) index is employed as the target parameter to attain optimum geometry. Six different cases are studied in this research, and each case has different geometrical dimensions. The inlet temperature for the fluids in the channel is 300 K, over a range of different flow velocities. According to the obtained results, an increase in the volume fraction of nanoparticles results in higher PEC values. In addition, an increase in Reynolds number to Re = leads to an increase in the PEC index. The results clearly show that increasing the Reynolds number has two consequences: on the one hand, it increases the pressure drop penalty; on the other hand, it improves heat transfer. Therefore, the maximum value of the PEC index occurs at Re = 15,000.

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Tập 9 Số 7

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