The mass and heat transfer in laminar pulsatile flow

The mass and heat transfer problem in laminar pulsatile flow is considered. The conditions under which the transfer rates in pulsatile flow increase or decrease when compared to the steady flow value are determined. Information as to when the existing theories are used to determine the frequency response of a diffusion controlled electrode is provided. The effect of diffusion in the flow direction on the overall transfer rates is examined. The mass and heat transfer problem in steady flow was considered theoretically for small values of Peclet numbers for which axial diffusion is important, and solved analytically by the technique of matched asymptotic expansions. This theory was used to obtain the quasi steady state solution for pulsatile flow.