Effects of different wall shapes on thermal-hydraulic characteristics of different channels filled with water based graphite-SiO2 hybrid nanofluid
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Date
Authors
Khetib, Yacine
Alahmadi, Ahmad
Alzaed, Ali
Tahmasebi, Ahamd
Sharifpur, Mohsen
Cheraghian, Goshtasp
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Abstract
In the current numerical study, various wall shape effects are investigated on the thermalhydraulic 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.
Description
Keywords
Hybrid nanofluid, Channel, Different wall, Graphite-SiO2 hybrid nanofluid, Performance evaluation criteria (PEC)
Sustainable Development Goals
Citation
Khetib, Y.; Alahmadi, A.;
Alzaed, A.; Tahmasebi, A.;
Sharifpur, M.; Cheraghian, G. Effects
of Different Wall Shapes on
Thermal-Hydraulic Characteristics of
Different Channels Filled with Water
Based Graphite-SiO2 Hybrid
Nanofluid. Processes 2021, 9, 1253.
https://doi.org/10.3390/pr9071253.