Annals of Biomedical Engineering

, Volume 4, Issue 2, pp 138–150 | Cite as

Ultrafiltration of blood: Effect of hematocrit on ultrafiltration rate

  • Masayuki Okazaki
  • Fumitake Yoshida


Rates of ultrafiltration of bovine blood of various hematocrits were measured in ultrafilters of hollow-fiber type. The results were analyzed by the gel-polarization model. The mass transfer coefficientk for the back-diffusion of protein molecules away from the gel layer, which controls the ultrafiltrate flux, increase with the cube root of the shear rate at the membrane surface. At a given shear rate, it increases and then decreases with increasing hematocrit. A working equation for predictingk is proposed.


Mass Transfer Shear Rate Membrane Surface Protein Molecule Cube Root 
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Copyright information

© Academic Press, Inc 1976

Authors and Affiliations

  • Masayuki Okazaki
    • 1
  • Fumitake Yoshida
    • 1
  1. 1.Chemical Engineering DepartmentKyoto UniversityKyotoJapan

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