Buoyancy Driven Heat Transfer of Water-Based CuO Nanofluids in a Tilted Enclosure with a Heat Conducting Solid Cylinder on its Center

摘要

Buoyancy driven heat transfer of water-based CuO nanofluid in a tilted enclosure with a heat conducting solid circular cylinder on the center is studied numerically with Comsol Multiphysics modeling and simulation software. The upper and the bottom walls of the enclosure are kept in adiabatic conditions and the sidewalls of the enclosure are in isothermal conditions. The results show that nanoparticle usage enhances the heat transfer rate considerably. The results also show that average Nusselt number shows first an increase and then a decrease as the inclination angle is increased. The maximum heat transfer takes place at θ=45 deg for Ra=10~4 and at θ=30 deg for Ra=10~5 and 10~6.