基于孔隙尺度建模和模拟的多孔反应器定制设计拓扑优化:PNM-NSGA 框架

IF 4.4 2区 工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Computers & Structures Pub Date : 2024-06-25 DOI:10.1016/j.compstruc.2024.107452
Mehrzad Alizadeh , Jeff Gostick , Takahiro Suzuki , Shohji Tsushima
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引用次数: 0

摘要

多孔反应器内的反应传输对许多不同的应用至关重要,而这些反应器的功效取决于其微观结构。数学建模和优化在探索高效设计方面起着举足轻重的作用,可生成随机实现填料可能无法实现的结构。在本研究中,我们提出了一个基于孔隙尺度模拟的多孔流过反应器高分辨率拓扑优化框架,并使用了非支配排序遗传算法 II。为模拟反应器的性能,我们建立了一个平流-扩散-反应系统的孔隙网络模型。该模型与数学优化算法相结合,并结合了背景网格和 Delaunay tessellation。优化框架可生成增强型多孔结构,同时最大限度地提高转化率,并最大限度地降低泵送成本。最终设计在渗透性和反应表面积之间取得了平衡,产生了一组帕累托最优解,其中包括具有不同反应速率和水力要求的各种非主导设计。结果表明,最佳孔隙配置可使一端的转化率提高 280%,泵送成本降低 6%,而在帕累托前沿的另一端,反应率提高 15.2%,泵送成本降低 11.3%。
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Topological optimization for tailored designs of advection–diffusion-reaction porous reactors based on pore scale modeling and simulation: A PNM-NSGA framework

Reactive transport within porous reactors is crucial to many diverse applications, and the efficacy of these reactors hinges on their microstructure. Mathematical modeling and optimization play a pivotal role in the exploration of efficient designs, enabling the generation of structures that may not be achievable through random realizations of packings. In this study, we propose a framework for high-resolution topological optimization of porous flow-through reactors based on pore-scale simulations using a non-dominated sorting genetic algorithm II. A pore network model for an advection–diffusion-reaction system is developed to simulate reactor performance. This model is integrated with a mathematical optimization algorithm, incorporating a background grid and Delaunay tessellation. The optimization framework generates enhanced porous structures, simultaneously maximizing conversion rates while minimizing pumping costs. Striking a balance between permeability and reactive surface area, the final designs yield a set of Pareto optimal solutions, encompassing diverse non-dominated designs with varying reaction rates and hydraulic requirements. The results demonstrate that optimal pore configurations lead to a 280% increase in conversion rates and a 6% reduction in pumping costs at one end, while on the opposite end of the Pareto front, a 15.2% increase in reaction rates and an 11.3% reduction in pumping costs are observed.

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来源期刊
Computers & Structures
Computers & Structures 工程技术-工程:土木
CiteScore
8.80
自引率
6.40%
发文量
122
审稿时长
33 days
期刊介绍: Computers & Structures publishes advances in the development and use of computational methods for the solution of problems in engineering and the sciences. The range of appropriate contributions is wide, and includes papers on establishing appropriate mathematical models and their numerical solution in all areas of mechanics. The journal also includes articles that present a substantial review of a field in the topics of the journal.
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