Pore-scale simulation of transport properties of carbonate rocks using FIB-SEM 3D microstructure: Implications for field scale solute transport simulations

Graphite electrodes in the lithium-ion battery exhibit various particle shapes, including spherical and platelet morphologies, which influence structural and electrochemical characteristics. It is well established that porous structures exhibit spatial heterogeneity, and particle morphology can influence transport properties. The impact of particle morphology on the heterogeneity and anisotropy of geometric and transport properties has not been previously studied. This study characterizes the spatial heterogeneities of eighteen graphite electrodes at multiple length scales by calculating and comparing structural anisotropy, geometric quantities, and transport properties (pore-scale tortuosity and electrical conductivity). We found that particle morphology and structural anisotropy play an integral role in determining the spatial heterogeneity of directional tortuosity and its dependency on pore-scale heterogeneity. Our analysis reveals that the magnitude of in-plane and through-plane tortuosity difference influences the multiscale heterogeneity in graphite electrodes.

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Microstructure and model solute transport properties of transglutaminase-induced soya protein gels: effect of enzyme dosage, protein composition and solute size

International Journal of Food Science & Technology ◽

10.1111/ijfs.13444 ◽

2017 ◽

Vol 52 (7) ◽

pp. 1527-1533 ◽

Cited By ~ 1

Author(s):

Chao Wu ◽

Yufei Hua ◽

Yeming Chen ◽

Xiangzhen Kong ◽

Caimeng Zhang

Keyword(s):

Solute Transport ◽

Transport Properties ◽

Protein Composition ◽

Soya Protein ◽

Protein Gels ◽

Enzyme Dosage

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Comparison of three stream tube models predicting field-scale solute transport

Hydrology and Earth System Sciences ◽

10.5194/hess-1-873-1997 ◽

1997 ◽

Vol 1 (4) ◽

pp. 873-893 ◽

Cited By ~ 7

Author(s):

D. Jacques ◽

J. Vanderborght ◽

D. Mallants ◽

D.-J. Kim ◽

H. Vereecken ◽

...

Keyword(s):

Solute Transport ◽

Transport Model ◽

Local Scale ◽

Transfer Model ◽

Transport Parameters ◽

Field Scale ◽

Stream Tube ◽

Solute Dispersion ◽

Measurement Volume ◽

Piston Flow

Abstract. In this paper the relation between local- and field-scale solute transport parameters in an unsaturated soil profile is investigated. At two experimental sites, local-scale steady-state solute transport was measured in-situ using 120 horizontally installed TDR probes at 5 depths. Local-scale solute transport parameters determined from BTCs were used to predict field-scale solute transport using stochastic stream tube models (STM). Local-scale solute transport was described by two transport models: (1) the convection-dispersion transport model (CDE), and (2) the stochastic convective lognormat transfer model (CLT). The parameters of the CDE-model were found to be lognormally distributed, whereas the parameters of the CLT model were normally distributed. Local-scale solute transport heterogeneity within the measurement volume of a TDR-probe was an important factor causing field-scale solute dispersion. The study of the horizontal scale-dependency revealed that the variability in the solute transport parameters contributes more to the field-scale dispersion at deeper depths than at depths near the surface. Three STMs were used to upscale the local transport parameters: (i) the stochastic piston flow STM-I assuming local piston flow transport, (ii) the convective-dispersive STM-II assuming local CDE transport, and (iii) the stochastic convective lognormal STM-III assuming local CLT. The STM-I considerably underpredicted the field-scale solute dispersion indicating that local-scale dispersion processes, which are captured within the measurement volume of the TDR-probe, are important to predict field-scale solute transport. STM-II and STM-III both described the field-scale breakthrough curves (BTC) accurately if depth dependent parameters were used. In addition, a reasonable description of the horizontal variance of the local BTCs was found. STM-III was (more) superior to STM-II if only one set of parameters from one depth is used to predict the field-scale solute BTCs at several depths. This indicates that the local-scale solute transport process, as measured with TDR in this study, is in agreement with the CLT-hypothesis.

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