EFFECTIVE DIFFUSION COEFFICIENT OF GAS IN POROUS MATERIALS AND GRANULAR BEDS

Mixing Behaviors of Wet Granular Materials in Gas Fluidized Beds

The mixing behaviors of dry and wet granular materials in gas fluidized bed systems were investigated computationally using the combined Computational Fluid Dynamics and Discrete Element Method (CFD-DEM). Dry particles were observed to mix fairly rapidly during the fluidization process due to vigorous relative motions between particles induced by the flow of gas. In contrast, due to the presenc...

Simulstion of Gas Diffusion in Capillaries and Porous Solids

Simulstion of Gas Diffusion in Capillaries and Porous Solids

Craters Formed in Granular Beds by Impinging Jets of Gas

When a jet of gas impinges vertically on a granular bed and forms a crater, the grains may be moved by several different mechanisms: viscous erosion, diffused gas eruption, bearing capacity failure, and/or diffusion-driven shearing. The relative importance of these mechanisms depends upon the flow regime of the gas, the mechanical state of the granular material, and other physical parameters. H...

simulstion of gas diffusion in capillaries and porous solids

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