The unsteady flow of blood in a straight, long, rigid pipe, driven by
an oscillatory pressure gradient is studied. Three different non-newto
nian models for blood are considered and compared. One of them turns o
ut to offer the best fit of experimental data, when the rheological pa
rameters ale suitably fixed. Numerical results are obtained by a spect
ral collocation method in space and the implicit trapezoidal finite di
fference method in time. (C) 1998 Elsevier Science Ltd. All rights res
erved.