Drop penetration into porous powder beds.

@article{Hapgood2002DropPI,
  title={Drop penetration into porous powder beds.},
  author={Karen P. Hapgood and James D. Litster and Simon Biggs and Tony Howes},
  journal={Journal of colloid and interface science},
  year={2002},
  volume={253 2},
  pages={353-66}
}
The kinetics of drop penetration were studied by filming single drops of several different fluids (water, PEG200, PEG600, and HPC solutions) as they penetrated into loosely packed beds of glass ballotini, lactose, zinc oxide, and titanium dioxide powders. Measured times ranged from 0.45 to 126 s and depended on the powder particle size, viscosity, surface tensions, and contact angle. The experimental drop penetration times were compared to existing theoretical predictions by M. Denesuk et al… CONTINUE READING

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