Combining Microtomography, 3D Printing, and Numerical Simulations to Study Scale Effects on the Permeability of Porous Media

Ozelim, Luan Carlos de Sena Monteiro; Cavalcante, André Luís Brasil

doi:10.1061/(asce)gm.1943-5622.0001340

Cited by 14 publications

(4 citation statements)

References 41 publications

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“…The largest difference in R S for topsoil cores was observed for S1 and its printed counterpart (1.00 and 0.61, respectively). Generally, these results showed the potential of using 3D prints to better understand physical processes in soils related to air transport, as also suggested by Bacher et al (2015), Dal Ferro and Morari (2015) and Ozelim and Cavalcante (2019) for physical processes related to water transport.…”

Section: Resultssupporting

confidence: 79%

“…Pore system characterization using X‐ray CT images is limited by the resolution, and laboratory measurements depend on the size of the soil cores (Ozelim & Cavalcante, 2019; Piccoli, Schjønning, Lamandé, Zanini, & Morari, 2019). The effective air‐filled porosity, ε a‐pyc , for the AAC material was 80% of the core volume (Table 3).…”

Section: Resultsmentioning

confidence: 99%

“…Nowadays, with 3D printing one can replicate the diversified geometry encountered in a soil at a resolution of few micrometres. However, only a few studies have shown the potential of using 3D prints to better understand physical, mechanical or biological processes in soils (Dal Ferro & Morari, 2015; Otten et al, 2012; Ozelim & Cavalcante, 2019; Wang et al, 2017). X‐ray CT imaging of 3D printed structures using different printing techniques revealed imperfections, such as clogging of parts of the pore space by printing material residues or printing‐aid material, which would introduce artefacts into the physical functioning (Bacher, Schwen, & Koestel, 2015; Dal Ferro & Morari, 2015; Watson et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Soil pore system evaluated from gas measurements and CT images: A conceptual study using artificial, natural and 3D‐printed soil cores

Lamandé

Schjønning

Ferro

et al. 2020

European J Soil Science

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Combining digital imaging, physical models and laboratory measurements is a step further towards a better understanding of the complex relationships between the soil pore system and soil functions. Eight natural 100‐cm3 soil cores were sampled in a cultivated Stagnic Luvisol from the topsoil and subsoil, which we assumed had contrasting pore systems. Artificial 100‐cm3 cores were produced from plastic or from autoclaved aerated concrete (AAC). Eight vertical holes of each diameter (1.5 and 3 mm) were drilled for the plastic cylinder and for one of the two AAC cylinders. All natural and artificial cores were scanned in an X‐ray CT scanner and printed in 3D. Effective air‐filled porosity, true Darcian air permeability, apparent air permeability at a pressure gradient of 5 hPa and oxygen diffusion were measured on all cores. The active pore system characteristics differed between topsoil (sponge‐like, network of macropores of similar size) and subsoil (dominated by large vertical macropores). Active soil pore characteristics measured on a simplified pore network, that is, from artificial and printed soil cores, supported the fundamental differences in air transport by convection and diffusion observed between top‐ and subsoil. The results confirm the suitability of using the conceptual model that partitions the pore system into arterial, marginal and remote pores to describe effects of soil structure on gas transport. This study showed the high potential of using 3D‐printed soil cores to reconstruct the soil macropore network for a better understanding of soil pore functions.

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Soil pore system evaluated from gas measurements and CT images: A conceptual study using artificial, natural and 3D‐printed soil cores

Lamandé

Schjønning

Ferro

et al. 2020

European J Soil Science

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“…The primary process involves delivery of a series of thin three-dimensional computer-aided design (CAD) or computed tomography cross-sections by the software to the printer for rapid imaging from bottom to top [1]. Three-dimensional printing is an all-inclusive term for a variety of methods that use digital data to produce 3D objects made of various materials (both synthetic and organic) [2,3]. This technology can rapidly produce customized devices and prostheses at low costs via simple development and design processes and is capable of a single item at a time, each unique in shape and design.…”

Section: Introductionmentioning

confidence: 99%

3D-printed eye model: Simulation of intraocular pressure

Kobashi¹,

Kobayashi²

2023

PLoS ONE

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Purpose To develop artificial eye models using 3D printing and to evaluate the correlation between different corneal thicknesses and intraocular pressures (IOPs). Methods We designed 7 artificial eye models using a computer-aided design system and fabricated them using 3D printing. Corneal curvature and axial length were based on the Gullstrand eye model. Hydrogels were injected into the vitreous cavity, and seven different corneal thicknesses (200 to 800 μm) were prepared. In this proposed design, we also produced different corneal stiffnesses. A Tono-Pen AVIA tonometer was used by the same examiner to perform five consecutive IOP measurements in each eye model. Results Different eye models were ideally created using 3D printing. IOP measurements were successfully performed in each eye model. The corneal thickness was significantly correlated with IOP (R2 = 0.927; 𝑃<0.001). Conclusion The 3D-printed eye model is useful for evaluating IOP measurements. This technique might be a promising alternative to the conventional porcine eye model.

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A 3D additive manufacturing approach for the validation of a numerical wall-scale model of catalytic particulate filters

Belot

Sun

Vidal

et al. 2021

Chemical Engineering Journal

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Combining Microtomography, 3D Printing, and Numerical Simulations to Study Scale Effects on the Permeability of Porous Media

Cited by 14 publications

References 41 publications

Soil pore system evaluated from gas measurements and CT images: A conceptual study using artificial, natural and 3D‐printed soil cores

Soil pore system evaluated from gas measurements and CT images: A conceptual study using artificial, natural and 3D‐printed soil cores

3D-printed eye model: Simulation of intraocular pressure

A 3D additive manufacturing approach for the validation of a numerical wall-scale model of catalytic particulate filters

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