Experimental and computational investigation of velocity field for intermediate region of laminar pulsatile pipe flow

In this study,velocity field in intermediate region of laminar-pulsatile pipe flow is investigated by using experimental and computational techniques. initially,variations of cross sectional velocity profile and static pressure difference at a test section through 30 different instants of a pulsation cycle are measured respectively by means of a hot-wire anemometer and a pressure transducer for 29 different runs covering the ranges; 2.26×10 3±17%≤re ta-4.36×10 3±10%,5.1±4%≤√ω≤28.0±0.05%,0.03≤a 1≤0.71. selected four different ones of the experimental runs are then analyzed computationally by using the finite-volume based fluent software-package. the results of both experimental and computational parts of this study indicate that the general tendencies of dimensionless velocity profiles are very similar to the blasius's distribution but differ appreciably from the prandtl's distribution for the all runs in intermediate region of laminar-pulsatile pipe flow. both the experimental and the computational velocity profiles become blunter than the blasius's distribution in some phases of the pulsation cycle but become sharper than it in the remaining phases for the all runs. ©2008 tibtd printed in turkey.