BENG112B_lecture7

BENG112B_lecture7 - Blood Flow in Large Vessels Recall from...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Blood Flow in Large Vessels Recall from week 2, if the fluid is Newtonian, lamina (e.g. N R is small): What if you have a non-Newtonian solution (e.g. blood) with Newtonian components? • μ blood / μ plasma = relative viscosity of blood Viscosity is not an intrinsic property ρ ρ U 2 /L inertia μ μ U/L 2 viscous force =N R
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Fahraeus-Lindqvist Effect on Apparent Viscosity • For blood flow in cylindrical vessels, μ apparent (or μ blood ) decreases with decreasing vessel radius. This is for cells spaced apart by more than d vessel ! u
Background image of page 2
Fahraeus-Lindqvist Effect on Apparent Viscosity In very narrow tubes, the inverse behavior occurs and RBCs are well spaced apart. Thus we can calculate the pressure drop from individual RBCs according to Poiseullien pipe flow: where n = and p * = p / * Can be simplied, as this is the correction for μ app Apparent relative viscosity of blood =
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Fahraeus-Lindqvist Effect on Apparent Viscosity Apparent relative viscosity of blood
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/17/2009 for the course BENG BENG 112B taught by Professor Engler during the Spring '09 term at UCSD.

Page1 / 8

BENG112B_lecture7 - Blood Flow in Large Vessels Recall from...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online