TY  - SER
AU  - Benitez-Olivares, Guiliermo
AU  - Valdes-Parada, Francisco J.
AU  - Soria-Lopez, Alberto
TI  - Macroscopic Model  for  Momentum Transport in Down-Flow Fluidization
KW  - Down-Flow Fluidzation
KW  - Volume Averaging
KW  - Permeability
ER  -