Natural convection flow of a nanofluid-filled W-shaped cavity

A two-dimensional numerical study of a laminar natural convection flow in a W-shaped cavity filled with CUO nanofluid has been conducted. The heat source is located on the lower wall with different heights h = 0.6L, 0.7L, 0.9L. This numerical study is developed to define the effect of different shapes of the hot wall with different heights h = H/4 and H/2. To analyze the thermal and dynamic fields and the heat transfer of the system, the finite volume method based on the SIMPLE algorithm was used to solve the permanent forms of the two-dimensional Navier-Stokes equations, as well as the conservation equations of mass and energy. The simulation explored how the Rayleigh number (Ra=104 to 106), nanoparticle volume fraction, as well as the geometry and height of the hot wall, affect the results. It is observed that the mean Nusselt number increases with an increase in Rayleigh number, nanoparticle volume fraction, resulting in an improvement in heat transfer, and decreases with increasing hot wall height.

Work In Progress