Papers › Efficient neural topology optimization via active learning for enhancing turbulent...
Efficient neural topology optimization via active learning for enhancing turbulent mass transfer in fluid channels
Chenhui Kou, Yuhui Yin, Min Zhu, Shengkun Jia, Yiqing Luo, Xigang Yuana, Lu Lu
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The design of fluid channel structures of reactors or separators of chemical processes is key to enhancing the mass transfer processes inside the devices. However, the systematic design of channel topological structures is difficult for complex turbulent flows. Here, we address this challenge by developing a machine learning framework to efficiently perform topology optimization of channel structures for turbulent mass transfer. We represent a topological structure using a neural network (referred to as `neural topology', which is optimized by employing pre-trained neural operators combined with a fine-tuning strategy with active data augmentation. The optimization is performed with two objectives: maximization of mass transfer efficiency and minimization of energy consumption, for the possible considerations of compromise between the two in real-world designs. The developed neural operator with active learning is data efficient in network training and demonstrates superior computational efficiency compared with traditional methods in obtaining optimal structures across a large design space. The optimization results are validated through experiments, proving that the optimized channel improves concentration uniformity by 37% compared with the original channel. We also demonstrate the variation of the optimal structures with changes in inlet velocity conditions, providing a reference for designing turbulent mass-transfer devices under different operating conditions.
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