Natural Convection and Entropy Generation of MgO/Water Nanofluids in the Enclosure under a Magnetic Field and Radiation Effects
The authors of the present paper sought to conduct a numerical study on the convection heat transfer, along with the radiation and entropy generation (EGE) of a nanofluids (NFs) in a two and three-dimensional square enclosure, by using the FVM. The enclosure contained a high-temperature blade in the...
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doaj-177e4080e41c47af923e9f9227179dcf2021-08-26T14:15:53ZengMDPI AGProcesses2227-97172021-07-0191277127710.3390/pr9081277Natural Convection and Entropy Generation of MgO/Water Nanofluids in the Enclosure under a Magnetic Field and Radiation EffectsYacine Khetib0Ahmad Aziz Alahmadi1Ali Alzaed2Ahamd Tahmasebi3Mohsen Sharifpur4Goshtasp Cheraghian5Mechanical Engineering Department, Faculty of Engineering, King Abdulaziz University, Jeddah 80204, Saudi ArabiaDepartment of Electrical Engineering, College of Engineering, Taif University, Taif 21944, Saudi ArabiaArchitectural Engineering Department, Faculty of Engineering, Taif University, Taif 21944, Saudi ArabiaIndependent Researcher, Dubai 999041, United Arab EmiratesClean Energy Research Group, Department of Mechanical and Aeronautical Engineering, Engineering III, University of Pretoria, Lynnwood Road, Pretoria 0002, South AfricaIndependent Researcher, Braunschweig 38106, GermanyThe authors of the present paper sought to conduct a numerical study on the convection heat transfer, along with the radiation and entropy generation (EGE) of a nanofluids (NFs) in a two and three-dimensional square enclosure, by using the FVM. The enclosure contained a high-temperature blade in the form of a vertical elliptical quadrant in the lower corner of the enclosure. The right edge of the enclosure was kept at low temperature, while the other edges were insulated. The enclosure was subjected to a magnetic field (MGF) and could be adjusted to different angles. In this research, two laboratory relationships dependent on temperature and volume fraction were used to simulate thermal conductivity and viscosity. The variables of this problem were Ra, Ha, RAP, nanoparticle (NP) volume fraction, blade aspect ratio, enclosure angles, and MGF. Evaluating the effects of these variables on heat transfer rate (HTR), EGE, and Be revealed that increasing the Ra and reducing the Ha could increase the HTR and EGE. On the other hand, adding radiation HTR to the enclosure increased the overall HTR. Moreover, an augmentation of the volume fraction of magnesium oxide NPs led to an increased amount of HTR and EGE. Furthermore, any changes to the MGF and the enclosure angle imposed various effects on the HTR. The results indicated that an augmentation of the size of the blade increased and then decreased the HTR and the generated entropy. Finally, increasing the blade always increased the Be.https://www.mdpi.com/2227-9717/9/8/1277elliptical bladenatural convectionentropy generationradiationMgO/water nanofluid |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yacine Khetib Ahmad Aziz Alahmadi Ali Alzaed Ahamd Tahmasebi Mohsen Sharifpur Goshtasp Cheraghian |
spellingShingle |
Yacine Khetib Ahmad Aziz Alahmadi Ali Alzaed Ahamd Tahmasebi Mohsen Sharifpur Goshtasp Cheraghian Natural Convection and Entropy Generation of MgO/Water Nanofluids in the Enclosure under a Magnetic Field and Radiation Effects Processes elliptical blade natural convection entropy generation radiation MgO/water nanofluid |
author_facet |
Yacine Khetib Ahmad Aziz Alahmadi Ali Alzaed Ahamd Tahmasebi Mohsen Sharifpur Goshtasp Cheraghian |
author_sort |
Yacine Khetib |
title |
Natural Convection and Entropy Generation of MgO/Water Nanofluids in the Enclosure under a Magnetic Field and Radiation Effects |
title_short |
Natural Convection and Entropy Generation of MgO/Water Nanofluids in the Enclosure under a Magnetic Field and Radiation Effects |
title_full |
Natural Convection and Entropy Generation of MgO/Water Nanofluids in the Enclosure under a Magnetic Field and Radiation Effects |
title_fullStr |
Natural Convection and Entropy Generation of MgO/Water Nanofluids in the Enclosure under a Magnetic Field and Radiation Effects |
title_full_unstemmed |
Natural Convection and Entropy Generation of MgO/Water Nanofluids in the Enclosure under a Magnetic Field and Radiation Effects |
title_sort |
natural convection and entropy generation of mgo/water nanofluids in the enclosure under a magnetic field and radiation effects |
publisher |
MDPI AG |
series |
Processes |
issn |
2227-9717 |
publishDate |
2021-07-01 |
description |
The authors of the present paper sought to conduct a numerical study on the convection heat transfer, along with the radiation and entropy generation (EGE) of a nanofluids (NFs) in a two and three-dimensional square enclosure, by using the FVM. The enclosure contained a high-temperature blade in the form of a vertical elliptical quadrant in the lower corner of the enclosure. The right edge of the enclosure was kept at low temperature, while the other edges were insulated. The enclosure was subjected to a magnetic field (MGF) and could be adjusted to different angles. In this research, two laboratory relationships dependent on temperature and volume fraction were used to simulate thermal conductivity and viscosity. The variables of this problem were Ra, Ha, RAP, nanoparticle (NP) volume fraction, blade aspect ratio, enclosure angles, and MGF. Evaluating the effects of these variables on heat transfer rate (HTR), EGE, and Be revealed that increasing the Ra and reducing the Ha could increase the HTR and EGE. On the other hand, adding radiation HTR to the enclosure increased the overall HTR. Moreover, an augmentation of the volume fraction of magnesium oxide NPs led to an increased amount of HTR and EGE. Furthermore, any changes to the MGF and the enclosure angle imposed various effects on the HTR. The results indicated that an augmentation of the size of the blade increased and then decreased the HTR and the generated entropy. Finally, increasing the blade always increased the Be. |
topic |
elliptical blade natural convection entropy generation radiation MgO/water nanofluid |
url |
https://www.mdpi.com/2227-9717/9/8/1277 |
work_keys_str_mv |
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