NEW LOOK AT THE LAMINAR-FLOW OF POWER LAW FLUIDS THROUGH GRANULAR BEDS

The paper deals with laminar flow of power law fluids through granular beds. A critical review of the assumptions concerning the capillary model of the bed, applied by various authors, led us to the conclusion that the derivation of the correlation eq. [13] given by Christopher and Middleman was based on a too simplified model of the granular bed. Taking advantage of the approach presented in the classical works of Kozeny and Carman (which seems to be partly overlooked by some authors, including our own previous works) a modified correlation equation for power law fluids [21], a corrected formula for shear rate in the bed [29] and for Deborah number [32], as well as corrected correlation equation for fluids exhibiting memory effects [34] were presented. © 1979 Dr. Dietrich Steinkopff Verlag.