面向对象的开孔泡沫塑料传热建模与仿真库
An Object-Oriented Library for Heat Transfer Modelling and Simulation in Open Cell Foams
摘要:
金属开孔泡沫塑料在工业上有多种用途,如:G.作为化学过程中的催化剂载体。它们规则或不均匀的微观结构决定了宏观热力学和化学性质。我们提出了一个面向对象的Python库,它可以从图像处理工具iMorph中导入微观泡沫数据,生成用于模拟和控制的状态空间模型。泡沫拓扑结构和3D几何数据是使用单元法对平衡定律进行离散建模的基础。虽然物质结构施加了一个原始链复杂的定义离散的热力学驱动力,内部能量平衡的第二链复杂,这是由拓扑对偶构造的评估。根据现有的表面数据,描述了固体和流体相之间的热交换。我们详细说明了双链复合体的构造,并展示了结构化离散模型如何直接映射到Python代码的软件对象。作为一个测试案例,我们提出了一个泡沫的开尔文细胞结构的模拟结果,并将它们与均匀参数的代理有限元模型进行比较。
英文摘要:
Metallic open cell foams have multiple applications in industry, e. g. as catalyst supports in chemical processes. Their regular or heterogeneous microscopic structure determines the macroscopic thermodynamic and chemical properties. We present an object-oriented python library that generates state space models for simulation and control from the microscopic foam data, which can be imported from the image processing tool iMorph. The foam topology and the 3D geometric data are the basis for discrete modeling of the balance laws using the cell method. While the material structure imposes a primal chain complex to define discrete thermodynamic driving forces, the internal energy balance is evaluated on a second chain complex, which is constructed by topological duality. The heat exchange between the solid and the fluid phase is described based on the available surface data. We illustrate in detail the construction of the dual chain complexes, and we show how the structured discrete model directly maps to the software objects of the python code. As a test case, we present simulation results for a foam with a Kelvin cell structure, and compare them to a surrogate finite element model with homogeneous parameters.
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