Eckstein E C, Koleski J F, Waters C M
Department of Biomedical Engineering, College of Engineering, University of Miami, Coral Gables, Florida.
ASAIO Trans. 1989 Jul-Sep;35(3):188-90.
Freeze-capture techniques were used to obtain concentration profiles of 1.0 and 2.5 microns latex beads in suspension flows with hematocrits from 15 to 60%. Profiles with near-wall concentrations more than twice the central concentration occurred for 2.5 microns beads in this range of hematocrits, but the near-wall excess appeared wider and shorter in 60% suspensions. For suspensions with 1.0 microns beads, the nature of the profile was dependent upon hematocrit. In all cases, at least a small near-wall excess was observed. For hematocrits of 40 and 60%, profiles for 1.0 microns beads were sometimes similar to those for 2.5 microns beads. For the 60% hematocrit and small beads, however, the excess was less than twice the central concentration in two of five trials. These findings are discussed in the context of previous experiments.
