Second law analysis of magnetic nanofluid flow through a permeable tank with wavy inner surface is scrutinized in this work. Mathematical formulation is based on the basic formulas of thermodynamics and fluid dynamics theories. The developed equations are re-structured by the involvement of new variables. CVFEM is utilized to display the exergy loss and entropy generation for various Hartmann (Ha), Rayleigh (Ra), and Darcy (Da) numbers. Results revealed that the Bejan number increases with an enhancement of Ra and Da. Exergy loss rises through the augmented magnetic force. Entropy generation due to porous media reduces for higher Da. Suppression influence on the transportation of ferrofluid is observed by the imposing magnetic force but reverse trend is reported for permeability parameter. The impact of Ha makes the convective mode weaker and increases the exergy loss.

在这项工作中，仔细研究了磁性纳米流体流过内表面呈波浪形的可渗透罐的第二定律分析。数学公式是基于热力学和流体动力学理论的基本公式。通过新变量的参与，重新构造了开发的方程式。CVFEM用于显示各种Hartmann（Ha），Rayleigh（Ra）和Darcy（Da）数的火用损失和熵的产生。结果显示，Bejan数随着Ra和Da的增加而增加。通过增加的磁力，火用损失增加。较高的Da导致由于多孔介质而产生的熵降低。施加的磁力观察到了对铁磁流体传输的抑制作用，但磁导率参数却报告了相反的趋势。