Entropy generation analysis during adjoint variable-based topology optimization of porous reaction-diffusion systems under various design dimensionalities
Entropy generation analysis during adjoint variable-based topology optimization of porous reaction-diffusion systems under various design dimensionalities
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DOI：
10.1016/j.ijheatmasstransfer.2022.123725
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发表时间：
2022-12-06
影响因子：
5.2
通讯作者：
Tsushima, Shohji
中科院分区：
文献类型：
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作者：
Charoen-amornkitt, Patcharawat;Alizadeh, Mehrzad;Tsushima, Shohji
几项研究试图通过改变整个多孔反应器孔隙率的空间分布来提高各种反应 - 扩散系统的性能，比如电化学装置的电极。然而，研究在不了解这种改进的理论极限的情况下进行。为了将优化技术与完善的理论方法相结合，本文提出了反应 - 扩散系统中扩散场设计的拓扑优化，以及使用非平衡热力学的熵产分析。利用伴随变量法对反应 - 扩散系统中的孔隙率分布进行了拓扑优化。优化问题被设定为使设计域内的反应最大化。对不同维度下的研究结果进行了比较和讨论。推导了反应 - 扩散系统局部熵产的公式，并用于评估拓扑优化结果。虽然研究结果显示0D和1D情况的总反应速率之间差异不显著，但更高维度（2D和3D）的优化显著提高了总反应速率。结果表明，最佳孔隙率分布对应着最均匀且最小的熵产。（c）2022爱思唯尔有限公司。保留所有权利。
Several studies attempted to enhance the performance of various reaction-diffusion systems, such as electrodes of electrochemical devices, by modifying the spatial distribution of porosity throughout the porous reactor. However, research is proceeding without knowing the theoretical limitation of the im-provement. To connect optimization techniques with a well-established theoretical approach, this paper presents topology optimization for the design of diffusion fields in reaction-diffusion systems together with entropy generation analysis using nonequilibrium thermodynamics. Topology optimization of poros-ity distribution in reaction-diffusion systems was carried out using the adjoint variable methods. The optimization problem was formulated to maximize the reaction in the design domain. The results ob-tained from the investigation under various dimensionalities were compared and discussed. A formula for the local entropy generation of reaction-diffusion systems was derived and used to assess the topology optimization results. While the findings showed an insignificant difference between the overall reaction rate of 0D and 1D cases, optimization of higher dimensionalities (2D and 3D) considerably enhanced the overall reaction rate. The results revealed that the optimum porosity distribution corresponds to the most uniform and minimum entropy generation. (c) 2022 Elsevier Ltd. All rights reserved.