International Journal of Engineering and Information Systems (IJEAIS)   Year: 2022 | Volume: 6 | Issue: 8 | Page No.: 27-49 Numerical Simulation of Natural Convection in a Sinusoidal Corrugated Enclosure with an Inner Circular Cylinder Filled with Ag-Nanofluid Superposed Porous Layers Download PDF Salam Hadi Hussain , , Mustafa Salah Rahomey and Basil Mahdi Al-Srayyih Abstract: Natural convection flows inside an enclosure partly filled by a vertical porous slab saturated with Ag-water nanofluid under the effects of an inner heated circular cylinder and a corrugated sidewall has been numerically investigated. The enclosure is uniformly heated with a constant temperature, Th at the surface of the inner cylinder fixed at the enclosure centre and cooled at the enclosure walls with a constant temperature, Tc. The porous slab is located on the left close to the vertical corrugated wall while the fluid layer is located on the right close to the vertical flat wall. The selected domain produced a different behaviour in the flow and heat transfer compared to the enclosures that were used in the previous literature. It has been concluded that there was a significant increase in the heat transfer rate recorded with increasing the Rayleigh number for different values of Darcy number. The lower value of the Darcy number can be overcome by increasing the nanoparticle volume fraction producing a relative enhancement of the heat transfer rate. The lower value of K_r produced a higher heat transfer rate for different Darcy numbers. A significant increase was recorded in the heat transfer rate when ? = 2 and Am = 0.2.