Mixed convective heat transfer enhancement in hybrid nanofluid flow through complex-finned tube cavities
Noreen Sher Akbar, Salman Akhtar, Shakil Shaiq, Majid Hussain, Taseer Muhammad, Muhammad Farooq, Muhammad Bilal Habib
Abstract
The advanced energy regulation systems demand an optimal heat balance that can be successfully accomplished through the application of hybrid nanofluids. This research work examines the numerical analysis on convective heat transfer with flow attributes of hybrid nanoparticles formed from molybdenum disulfide and graphene oxide inside a circular domain having narrow edge fins. We have integrated a novel fin configuration with convective heat transfer analysis of hybrid nanofluids. Thermal convection and magnetohydrodynamic effects are employed for this steady, incompressible, laminar flow phenomenon. The complex configuration of governing partial differential equations is numerically solved by utilizing finite element simulations. The impact of fin count on thermal efficiency is evaluated by incorporating 4 and 10 fins respectively. Streamlines, isotherms, and Nusselt number patterns are analyzed against significant dimensionless parameters. The increased fin count optimizes the heat transfer mechanism through improved fluid mixing and greater recirculation zones. The synergistic effects of hybrid nanofluid flow phenomenon efficiently improves heat absorption, flow characteristics, and overall thermal efficiency. The flow field is further stabilized through the application of external magnetic field effects that promotes a uniform distribution with efficient heat transfer. The fin count and design have pivotal role in supervising flow obstructions with better heat flux in magnetohydrodynamic flow environment. The increasing value of Reynold number from 1.1 to 1.5 results in a 20% increase of Nusselt number from 3.0 to 3.6. A further increase of 11% in Nusselt number is noted for Reynold equal to 1.7. Nusselt number significantly increases up to 67%, 89%, and 95% with an 80% increase in Prandtl number for Reynold equal to 1.1, 1.5, and 1.7 respectively. Thus, the higher flow rate and increased viscous effects significantly enhance convective heat transfer in finned tube cavity. The studied parameters have the following ranges 0.1 ≤ P r ≤ 20.1 ; 1 ≤ M ≤ 41 ; 0.1 ≤ G r ≤ 0.002 ; 1 ≤ R e ≤ 31 ; 1 ≤ E c ≤ 61 ; 1 ≤ R d ≤ 6 ; 0.01 ≤ ϕ 2 ≤ 0.05 .