Heat transfer enrichment of nanofluid in a lid-driven porous cavity with an isothermal block

In this work, heat transfer enrichment using nanofluid in a lid-driven porous cavity having an isothermal solid block has been investigated numerically through three distinct cases based on the moving direction of horizontal wall(s). The modeled governing partial differential equations are numerically solved by SIMPLE algorithm and the resulting outcomes are validated with previous works both in qualitative and quantitative nature. Numerical results of various emerging parameters such as Richardson number (0.01 ≤Ri ≤ 100), Darcy number (10-5 ≤Da ≤ 10-1), Block length (0.25 ≤BL ≤ 0.75) and volume fraction of suspended nanoparticles (0.0 ≤ φ ≤ 0.05) were discussed. The results clearly show that the direction of moving walls plays a crucial role on the flow and heat transfer, in particular, the opposite direction of moving walls yields the highest heat transfer rate. In addition to that, significant influence of isothermal block is found and determined that the block length of 0.75 causes the maximum rate of heat transfer in the entire system.