Abstract:
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 hightemperature 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.
