laminar to turbulent flow transition as a function of Reynolds
number. Velocity transition from a parabolic profile to a blunt profile is also seen. From
Nichols and O’Rourke
The most important observation and quantification made by Reynolds
is in the differentiation
turbulent flow from laminar flow.
that the turbulence depends not only on the average velocity v
fluid, but also depending on the fluid property and the lumen diameter d.
The laminar to turbulent flow transition is shown in Fig.
is assumed when turbulence begins.
Mach number is invariant among mammalian blood vessels, but the
Reynolds number is dependent on body size (Li,
normally occurs with high Reynolds number is somewhat constrained in
a larger mammal’s aorta by the larger compliance (Li,