期刊
PROCESSES
卷 9, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/pr9071253
关键词
hybrid nanofluid; PEC; graphite-SiO2; channel; different wall
资金
- Taif University Researchers Supporting Project, Taif University, Taif, Saudi Arabia [TURSP-2020/121]
Through a numerical study, it is found that an increase in nanoparticle volume fraction and Reynolds number leads to changes in thermal-hydraulic characteristics inside the channel, resulting in an increase in the PEC index, which reaches its maximum value at a Reynolds number of 15,000.
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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