Abstract
Numerical simulations have been made on the flow and heat-and-mass transfer in a falling liquid film. The development of a two-dimensional wave was successfully predicted, which consists of a large solitary wave and ripple waves in front of it. Heat and mass transfer is enhanced by the wave, and the enhancement is remarkable in the case of mass transfer with high Sc number. Three-dimensional calculations indicate that a two-dimensional wave becomes unstable with the increase of Re number, resulting in U-shaped three-dimensional waves. The Sh number increases with the transition from 2D to 3D waves.
