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

在当前文章中，通过数值研究了冷方孔外壳和热瓦楞缸之间的自然对流。外壳填充有悬浮金属纳米颗粒的水基纳米流体，多孔层采用Brinkman-Forchheimer定律建模。有限元方法已被用来求解控制方程。在这项研究中的分析是：波纹表面的幅度，波纹表面的数量和浓度被考虑。已经发现，在特定情况下，瓦楞滚筒的热传递可能比平滑滚筒的热传递稍好，但是通常，通过施加瓦楞表面减少了热传递。传热增强到$10％$通过增加纳米粒子的浓度。传热速率不会随着浓度的增加而线性增加，而是与浓度的平方根成正比。