Heat and mass transfer from moist air flowing over moving water film : the oretical study

Abstract EN

Heat and mass transfer from or to a horizontal moving water film to airflow flowing over the film inside a rectangular duct wind tunnel is investigated, experimentally.

To perform the experimental study for this phenomenon air flows inside a rectangular duct over a moving water film flow inside the duct, which is fixed in the floor of the tunnel.

Therefore, some of the water film is evaporated from the water surface to the air flowing over it.

The following measurements for velocity of moist air and water, temperature, humidity, are taken at five positions along test section and upstream of the water panel.

Also, the amount of water evaporated through each experiment is measured.

The results show that, Nusselt and Sherwood numbers increase with increasing Reynolds number.

Comparison between the obtained results and the previous works show good agreement.