Combining X-ray microtomography with computer simulation for analysis of granular and porous materials

Moreno-Atanasio, Roberto; Williams, Richard A.; Jia, Xiaodong

doi:10.1016/j.partic.2010.01.001

Cited by 136 publications

(59 citation statements)

References 107 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, each voxel in a digital image can be considered as an element in finite element simulations. Therefore, a total and direct transference of information between the digital image and the simulation grid can be carried out [Moreno-Atanasio et al, 2010]. However, the main disadvantage of these approaches is that the size of the numerical sample and resolution (voxel size) at which one could simulate is constrained by available computational resources.…”

Section: Introductionmentioning

confidence: 99%

Simulating the effect of microcracks on the diffusivity and permeability of concrete using a three-dimensional model

Abyaneh

Wong

Buenfeld

2016

Computational Materials Science

View full text Add to dashboard Cite

Concrete inevitably contains microcracks, but their significance on transport properties and long-term durability is not well established. This is because of difficulties in isolating and evaluating the effect of microcracks whether by laboratory experiments or computer simulations, owing to their complex heterogeneous nature. In this paper, a three-dimensional numerical approach to simulate mass transport properties of concrete containing microcracks is presented. The approach is based on finite-element method and adopts aligned meshing to improve computational efficiency. The mesostructure of concrete is represented by aggregate particles that are surface meshed by triangulation and porous cement paste matrix that are discretised with tetrahedral elements. Microcracks are incorporated as interface elements at the aggregate-paste interface or at the cement paste matrix spanning neighbouring aggregate particles. The main advantage of this approach is that the smallest microcracks can be simulated independent of the discretisation size. The model was first validated by comparing the simulations to available analytical solutions. Then, the diffusivity and permeability of a range of concretes containing different amounts of microcracking with increasing complexities were simulated. The results are analysed and discussed in terms of the effect of microcrack type (bond, matrix), volume fraction, width, specific surface area and degree of percolation on transport properties.

show abstract

Section: Introductionmentioning

confidence: 99%

Simulating the effect of microcracks on the diffusivity and permeability of concrete using a three-dimensional model

Abyaneh

Wong

Buenfeld

2016

Computational Materials Science

View full text Add to dashboard Cite

show abstract

“…The effects of agglomerate shape and structure on breakage patterns during compression were analysed. A similar piece of work was carried out by Moreno-Atanasio et al [14]. More recently, Dadkhah et al [15,16] characterised the internal morphology of agglomerates produced by a spray fluidised bed using X-ray micro-tomography.…”

Section: Accepted M Manuscriptmentioning

confidence: 82%

3D printed agglomerates for granule breakage tests

Ghadiri

Bonakdar

et al. 2017

Powder Technology

View full text Add to dashboard Cite

In the research into agglomeration, a long term barrier is the lack of a universally accepted method to evaluate the breakage propensity of agglomerates. Computer simulation is often used but is limited by the lack of identical, controlled agglomerates to test and validate simple models, let alone replicate the complex structure of real industrial agglomerates. This paper presents work on the characterisation of strength of model test agglomerates prepared by a 3D printing production method enabling fully reproducible structures.Agglomerates were designed using Solidworks 2014 software and printed by an Objet500 Connex 3D printer. Materials with different mechanical properties were used to print the particles and the inter particle bonds, allowing a series of combinations of bond strength, particle strength and agglomerate structure to be tested. Compression and impact tests were performed to investigate the breakage behaviour of the printed agglomerates in terms of agglomerate orientations, bond properties and strain rates. This method will allow more rigorous testing of agglomerate breakage models.

show abstract

“…In this approach, capturing the shape of the boundaries is inherently limited to a staircase approximation because of the cubic shape of the voxels that are the smallest accessible units of data in XCT images. A comprehensive literature review addressing advances in combining XCT with computer simulation, including the LBM, for the analysis of porous materials has been presented by Moreno-Atanasio et al [6]; this review also includes a procedure for using binary representation of the real geometry of porous structures as the input for LBM simulation. The limiting factor in this approach is not the spatial resolution of the XCT device but the computational cost of the LBM simulation if the same LBM grid resolution is to be used.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a new solid boundary implementation in the lattice Boltzmann method for porous media considering permeability and apparent slip

Moqtaderi

Esfahanian

2011

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

The accuracy of solid wall treatment in the lattice Boltzmann method (LBM) simulation of porous structures affects different hydraulic parameters including integral properties, such as permeability, or local phenomena, such as apparent slip. Based on an analysis of the advantages and disadvantages of the current methods, a new technique is introduced for exact boundary extraction from binary representation. Using this technique, the LBM model can simultaneously benefit from the advantages of existing approaches, i.e. the real micro-/nanostructure obtained with X-ray computed tomography, and a reduction in the resolution requirement. To evaluate the technique, permeability and slip length on the solid walls are investigated for a porous gas diffusion layer. The results show acceptable accuracy improvement balanced with computational costs.

show abstract

Combining X-ray microtomography with computer simulation for analysis of granular and porous materials

Cited by 136 publications

References 107 publications

Simulating the effect of microcracks on the diffusivity and permeability of concrete using a three-dimensional model

Simulating the effect of microcracks on the diffusivity and permeability of concrete using a three-dimensional model

3D printed agglomerates for granule breakage tests

Evaluation of a new solid boundary implementation in the lattice Boltzmann method for porous media considering permeability and apparent slip

Contact Info

Product

Resources

About