Pressure Drop in High-Density Porous Metals via Tomography Datasets

The permeability of replicated microcellular structures in the Darcy regime

“…As the mean pore diameter openings increase, the materials surface area to bulk volume ratio ( σ FB ) progressively decreases and the results are the creation of more permeable structures which invariably provide lesser resistance to the flowing fluid across the interstices of the porous media. More so, an increase in the additional pressure drop was observed with increasing pore‐nonuniformity (increase in dynamic tortuosity) of the porous materials and this confirms the tendency to increase the energy dissipated within the narrow passages due to the frictional contact between the moving fluid and rigid pore walls . However, this was done by a preliminary modeling of the CFD pressure drop across longer and shorter length samples and would require additional experimental analysis to affirm the reliability of this hypothesis.…”

“…More so, an increase in the additional pressure drop was observed with increasing pore-nonuniformity (increase in dynamic tortuosity) of the porous materials and this confirms the tendency to increase the energy dissipated within the narrow passages due to the frictional contact between the moving fluid and rigid pore walls. [36][37][38][39] However, this was done by a preliminary modeling of the Note: Y11, Y12, Y13, Y14, and Y15 are symbols for the adapted structures created by removing 1, 2, 3, 4, and 5 voxels from the skeletal phases of the materials, respectively. Dp is the mean pore size (mm), Dw is the mean pore openings (mm), ε is the porosity (%), σ FB is the structure surface area per unit bulk volume (m −1 ), σ FF is the structure surface area per unit structure volume (m −1 ), k 0 is the Darcian permeability (m 2 ).…”