Drag and heat transfer closures for realistic numerically generated random open-cell solid foams using an immersed boundary method

Das, Soumen; Sneijders, Stephan; Deen, NG Niels; Kuipers, J.A.M.

doi:10.1016/j.ces.2018.03.022

Cited by 39 publications

(8 citation statements)

References 39 publications

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“…Generally, for commercial foams, cell sizes in the range [0.5-5 mm], porosities in the range of [0.75-0.9] for ceramic substrates [0.85-0.96] for metallic substrates and surface to volume ratios in the range [300-5,000 m −1 ] have been reported. As already reported for honeycombs, a high surface area of the support promotes gas/solid heat and mass transport, at the expenses of pressure drops (Das et al, 2018).…”

Section: Open Cell Foamssupporting

confidence: 53%

Recent Advances in the Development of Highly Conductive Structured Supports for the Intensification of Non-adiabatic Gas-Solid Catalytic Processes: The Methane Steam Reforming Case Study

et al. 2022

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Structured catalysts are strong candidates for the intensification of non-adiabatic gas-solid catalytic processes thanks to their superior heat and mass transfer properties combined with low pressure drops. In the past two decades, different types of substrates have been proposed, including honeycomb monoliths, open-cell foams and, more recently, periodic open cellular structures produced by additive manufacturing methods. Among others, thermally conductive metallic cellular substrates have been extensively tested in heat-transfer limited exo- or endo-thermic processes in tubular reactors, demonstrating significant potential for process intensification. The catalytic activation of these geometries is critical: on one hand, these structures can be washcoated with a thin layer of catalytic active phase, but the resulting catalyst inventory is limited. More recently, an alternative approach has been proposed, which relies on packing the cavities of the metallic matrix with catalyst pellets. In this paper, an up-to-date overview of the aforementioned topics will be provided. After a brief introduction concerning the concept of structured catalysts based on highly conductive supports, specific attention will be devoted to the most recent advances in their manufacturing and in their catalytic activation. Finally, the application to the methane steam reforming process will be presented as a relevant case study of process intensification. The results from a comparison of three different reactor layouts (i.e. conventional packed bed, washcoated copper foams and packed copper foams) will highlight the benefits for the overall reformer performance resulting from the adoption of highly conductive structured internals.

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Section: Open Cell Foamssupporting

confidence: 53%

Recent Advances in the Development of Highly Conductive Structured Supports for the Intensification of Non-adiabatic Gas-Solid Catalytic Processes: The Methane Steam Reforming Case Study

et al. 2022

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“…于分析界面耦合条件 [12,23,24] 、Weaire-Phelan结构 [25] 、基于LVT方法生成的结构 [19] 和以表面能最小为目标演化得到的随机结构 [20] . 后两种结构具有随机性, 更接近真实的泡沫…”

Section: 公开文献中对复合结构的模拟研究有限其主要集中unclassified

Pore-scale simulation of flow in minichannels with porous fins

Gao¹,

Xu²,

Liang³

2020

Sci. Sin.-Tech.

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“…The numerical simulation can quantitatively analyse the interaction behaviours, including heat transfer, drag and deformation, which induce an exchange of momentum and energy between the shocked air and the porous foam. Although some studies conducted a direct numerical simulation considering the random microstructure of a foam (Wehinger, Heitmann & Kraume 2016;Das et al 2018), it is computationally expensive to discuss the propagation and the mitigation of the blast wave that propagates for approximately 1 m for the laboratory scale and 1 km for the real scale. A realistic solution for discussing the blast wave/porous foam interaction is a multiphase macroscopic approach that determines the averaged quantities of mass, momentum and energy for both gas and porous foam phases.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the interaction between a shock wave and porous foam and the mitigation mechanism of porous foam filling a straight tube on a blast wave

et al. 2022

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This study validated a two-phase compressible flow model considering elasto-plastic porous foams. The numerical data were compared with the previous experimental results in terms of the interaction between the planar shock wave and the porous foams and the mitigation effect of a porous foam filling a straight tube on a blast wave. The porous foams in the shock tube interacted with a planar shock wave. The drag between the shocked air and the foams reduced the shock wave strength. Moreover, the flexible foam was significantly deformed by the shock wave. The validation results confirmed good agreement and consistency between the numerical and experimental data. The mitigation effect on the blast wave caused by a high explosive, where the main parameter for comparison was the location of a rigid porous foam layer inside the straight tube, was investigated. In the first case, the porous foam plate was placed on the floor, whereas in the second case, the porous foam plates were placed on the floor, sidewalls and ceiling. The total energy transferred between the porous foam and the shocked air was computed to quantitatively understand the mitigation mechanism of the porous foam on the blast wave. The heat transfer was a dominant factor for the energy transfer from the shocked air to the porous foams. The second case further mitigated the blast wave outside, and the increment of the interface area of the air/porous foam greatly affected the blast wave mitigation.

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Drag and heat transfer closures for realistic numerically generated random open-cell solid foams using an immersed boundary method

Cited by 39 publications

References 39 publications

Recent Advances in the Development of Highly Conductive Structured Supports for the Intensification of Non-adiabatic Gas-Solid Catalytic Processes: The Methane Steam Reforming Case Study

Recent Advances in the Development of Highly Conductive Structured Supports for the Intensification of Non-adiabatic Gas-Solid Catalytic Processes: The Methane Steam Reforming Case Study

Pore-scale simulation of flow in minichannels with porous fins

Numerical study on the interaction between a shock wave and porous foam and the mitigation mechanism of porous foam filling a straight tube on a blast wave

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