Abstract
This experimental study describes mass transfer enhancement in a wavy-walled tube for pulsatile flow. The effect of Strouhal number on mass transfer enhancement is especially focused. It is found that the peak mass transfer enhancement occurs at an intermediate Strouhal number, depending on the oscillatory fraction of the flow rate. The flow visualization result indicates that the unstable flow generated in the decelerating phase leads to the fluid mixing and contributed to the mass transfer enhancement.
