Convection heat and mass transfers in a vertical duct

Abstract

Abstract Heat and mass transfers are analysed in a vertical duct where an air flow is established. One of the plates is heated and cooled by a falling water film. Temperatures at the wall and at the water-air interface are measured using thermocouples and an infrared thermography system. It is shown that the infrared camera measures the water surface temperature. From temperature measurements, local Nusselt numbers are calculated for different wall heat flux densities and liquid mass rates. From these Sherwood numbers are deduced using Lewis function assumption