Magnetic field impact on nanofluid convective flow in a vented trapezoidal cavity using Buongiorno's mathematical model

Abstract

Numerical study for the effect of an external magnetic field on the mixed convection of Al2O3–water Newtonian nanofluid in a right-angle vented trapezoidal cavity was performed using the finite volume method. The non-homogeneous Buongiorno model is applied for numerical description of the dynamic phenomena inside the cavity. The nanofluid, with low temperature and high concentration, enters the cavity through the upper open border, and is evacuated through opening placed at the right end of the bottom wall. The cavity is heated from the inclined wall, while the remainder walls are adiabatic and impermeable to both the base fluid and nanoparticles. After validation of the model, the analysis was carried out for a wide range of Hartmann number (0 ≼ Ha ≼ 100) and nanoparticles volume fraction (0 ≼ ϕ0 ≼ 0.06). The flow behavior as well as the temperature and nanoparticles distribution shows a particular sensitivity to the variations of both the Hartmann number and the nanofluid concentration. The domination of conduction mechanism at high Hartmann numbers reflects the significant effect of Brownian diffusion which tends to uniform the distribution of nanoparticles in the domain. The average Nusselt number which increases with the nanoparticles addition, depends strongly on the Hartmann number. Finally, a correlation predicting the average Nusselt number within such geometry as a function of the considered parameters is proposed.

Mixed convection in sinusoidal lid driven cavity with non-uniform temperature distribution on the wall utilizing nanofluid

“…To show the effectiveness of nanofluid, lid-driven cavities a good choice to achieve that. As a result, many of researchers investigated the mixed convection in cavities utilize nanofluid or non-Newtonian according to cavity geometry in the recent years [ 19 , 20 , 21 , 22 , 23 , 24 , 25 ].…”

“…To show the effectiveness of nanofluid, lid-driven cavities a good choice to achieve that. As a result, many of researchers investigated the mixed convection in cavities utilize nanofluid or non-Newtonian according to cavity geometry in the recent years [19,20,21,22,23,24,25]. Kahveci et al (2016), [26] presented the effect of viscosity models of CuO nanofluid in mixed convection lid-driven cavity during constant heat flux.…”

Effects of Surface Rotation on the Phase Change Process in a 3D Complex-Shaped Cylindrical Cavity with Ventilation Ports and Installed PCM Packed Bed System during Hybrid Nanofluid Convection

“…Many methods have been offered to improve the HT with vented cavities, such as using fins [25,26], rotating objects [27,28], flow pulsations [29,30], magnetic fields [31], and elastic walls [32]. Nanofluids have also been considered in vented cavities and in convection studies [33][34][35][36][37][38], and their effectiveness has been shown.…”

Investigation of phase change dynamics in a T-shaped multiple vented cylindrical cavity during nanofluid convection for PCM-embedded system

“…Over the years, many advancements and modeling improvements have been achieved to simulate the nanofluid behavior and asses their improvements in diverse thermal systems (Kakaç and Pramuanjaroenkij, 2009;Sajid and Ali, 2019;Ismael et al, 2016;Mehryan et al, 2020;Esfe et al, 2020;Chamkha et al, 2015;Darbari and Rashidi, 2021;Mohebbi and Rashidi, 2017;Mehryan et al, 2017). The effectiveness of using nanofluids in VeC systems has been shown in many studies (Jasim et al, 2021;Benzema et al, 2019;Kalidasan and Kanna, 2016;Selimefendigil and Öztop, 2019;Ahmed, 2020). Depending upon the port locations, operating conditions and nanofluid types, different improvement HFF 32,11 amounts have been reported.…”