Abstract
The permeability of particle packing system depends on the pore porosity and tortuosity, and the microstructure of porous network is related to particle shape and volume fraction. This work employs superovoids to construct the particles formed by weathering or water movement, and proposes a powerful theoretical method to estimate the effects of particle volume fraction, shape and size-polydispersity on pore tortuosity. The permeability of the particulate composite is numerically acquired by lattice Boltzmann method (LBM). Both of the theoretically and numerically obtained data are validated by comparing with the extensive results, which indicates that employed theoretical method and numerical model can be viewed as general strategies suitable for characterizing pore tortuosity and permeability of particulate composite. The findings establish the quantitative relationship of “component-microstructure-property” for particle packing system, which can provide some guidance for optimizing particulate composites.
Published Version
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