摘要：Natural convection between a cold square porous enclosure and a hot corrugated cylinder is studied numerically in thecurrent article. The enclosure is filled with a water-base nanofluids suspending metal nanoparticles and the porous layeris modelled applying the Brinkman-Forchheimer law. The finite element method has been utilised to solve the governingequations. Analysis in this studies are: the amplitude of corrugated surface, the number of corrugated surface and theconcentration are considered. It is found that the heat transfer of the corrugated cylinder might be slightly better thanthe heat transfer of the smooth cylinder under specific circumstances, but in general, the heat transfer is reduced byapplying the corrugated surface. The heat transfer enhances up to 10% by increasing nanoparticle concentration. Theheat transfer rate does not increase linearly by increasing the concentration, but it is proportional to the square root ofthe concentration.
关键词：Brinkman-Forchheimer; natural convection; corrugated surface; nanofluids; FEM
