Influence of a membrane on nanofluid heat transfer and irreversibilities inside a cavity with two constant-temperature semicircular sources on the lower wall: applicable to solar collectors
Shu‐Rong Yan, Saeed Aghakhani, Arash Karimipour
Abstract
In this paper, free heat transfer () and the entropy generation () of Alumina/ nanofluid (NF) in an square cavity (CV) are simulated owing to its application in solar collectors. For this purpose, a square CV with an angle γ is placed under a fixed magnetic field. The upper wall has a temperature of Tc and sidewalls are insulated. On the lower wall of the CV, which is also insulated, two half-pipe with a temperature of Th are mounted. In the middle of the CV, there is a partition with a conductivity coefficient. The Control volume method is employed to follow the SIMPLE algorithm for the simulation. The variable parameter included < < The simulation results demonstrated that growing the Rayleigh (Ra) number increased the rate of and while the increase in the Hartmann (Ha) number decreased both these parameters. Furthermore, the addition of nanoparticles (NPs) resulted in more Increasing the thermal conductivity of the partition in strong free convective mode enhanced the while, in poor free convective it reduced the The lowest and occurred in the horizontal CV.