Effect of a Square-Shaped Heat Source on the Buoyancy-Driven Heat Transfer in a Square Cavity Filled with TiO2-water Nanofluid

Buoyancy-driven fluid flow and heat transfer due to a square-shaped heat source placed inside a square cavity filled with the TiO2-water nanofluid are investigated numerically. The heat source is maintained at a constant temperature Th while the cavity walls are kept at a differentially lower constant temperature Tc. The governing equations written in terms of the primitive variables are solved using the finite volume method and the SIMPLER algorithm. The simulations are performed for a range of Rayleighnumbers from 10^3 to 10^6, and for different volume fractions of the nanoparticles. It is observed from the numerical outcome of the present study that the average Nusselt number is generally an increasing function of the volume fraction of the nanoparticles and also the rate of the heat transfer increased by increasing the Rayleigh number.

کلیدواژه ها:

Natural convection ، Nanofluid ، Heat source ، Square cavity ، Finite volume method