Abstract Pattern of fluid flow through open-cell foams is important because of its influence on the performance of processes such as filtration, adsorption and heterogeneous catalysis that make use of such foams. So far, however, the experimental verification of velocity profiles obtained by computational fluid dynamics (CFD) simulation was insufficient. Here, the effect of morphology of ceramic foams on local gas flow patterns is observed via the noninvasive magnetic resonance velocimetry (MRV) technique. In order to cross-validate the simulations with the experimental flow mapping results, micro-computed tomography (µCT) data of the entire foams were used for generating the computational network required for 3D CFD simulations of velocity fields within the pores. The results of CFD simulations and MRV measurements of gas flow showed a remarkable agreement with deviations mainly below 10 percent if the whole foam structure was utilized in CFD simulations. The qualitative and quantitative agreement between CFD and MRV results underlines the reliability of CFD simulations that are based on µCT data and underpins the capability of NMR-based measurements for in situ velocity measurements. Graphic abstract

中文翻译：

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开孔泡沫内气体流动的全场分析：基于微计算机断层扫描的 CFD 模拟与实验磁共振流动映射数据的比较

摘要 流体流经开孔泡沫的模式很重要，因为它会影响使用此类泡沫的过滤、吸附和多相催化等过程的性能。然而，到目前为止，通过计算流体动力学 (CFD) 模拟获得的速度剖面的实验验证是不够的。在这里，通过无创磁共振测速 (MRV) 技术观察陶瓷泡沫的形态对局部气体流动模式的影响。为了将模拟与实验流动映射结果进行交叉验证，整个泡沫的微计算机断层扫描 (μCT) 数据用于生成孔内速度场 3D CFD 模拟所需的计算网络。如果在 CFD 模拟中使用整个泡沫结构，CFD 模拟和气流 MRV 测量的结果显示出显着的一致性，偏差主要低于 10%。CFD 和 MRV 结果之间的定性和定量一致性强调了基于 µCT 数据的 CFD 模拟的可靠性，并支持了基于 NMR 的测量进行原位速度测量的能力。图形摘要