The present work investigates the effect of pulsation on the transport process in a 2D microchannel. The inlet velocity
varies sinusoidally in time at a constant dimension less frequency (St=10) and amplitude of 0.8. The working fluid is considered
as water which is made to flow in the flow disturbing microchannel whiles the microchannel walls were kept at a uniform
temperature. The solution of two-dimensional Navier-Stokes equation was performed using the SIMPLE algorithm with the
momentum interpolation technique. The simulations were performed in the laminar regime within the Reynolds number range
between 100- 500 for the microchannel. The results of pulsating flow simulations had been analysed and compared with nonpulsating flow simulations. It is observed that the effect of pulsation in flow interrupting ribbed microchannel is significant
