For the case of blood I would recomend you two papers regarding viscosity:
R. Fahraeus and T. Lindqvist, “The viscosity of the blood in narrow capillary tubes,” Am. J. Physiol. 96, 562–568 (1931).
A. R. Pries, D. Neuhaus, and P. Gaehtgens, “Blood viscosity in tube flow: dependence on diameter and hematocrit,” Am. J. Physiol. 263, H1770–H1778 (1992).