In this study, a numerical analysis is conducted to investigate mixed convection heat and mass transfer in an inclined channel with a wavy liquid film that is heated by a constant flux, while the other wall is isothermal. Both liquid and gas phases are discretized using an implicit finite difference scheme. The inclined channel is composed of two parallel plates. The right plate is dry and isothermal, while the left plate is wetted by a falling liquid film exposed to a uniform heat flux from the outside. Water film makes up the liquid, while dry air and water vapor make up the gas mixture. The simulation results relate to the effects of the amplitude and characteristic length of the film’s curve, on the heat and mass transfer, as well as liquid film evaporation. The results suggest that increasing the amplitude and number of wall waves can enhance heat and mass transfer as well as the liquid film evaporation. However, the sensible heat and mass transfer may decrease with a very small value of wall wave amplitude.

water film evaporation, wavy liquid film, mixed convection, heat and mass transfer, numerical simulation.

Received: June 25, 2023; Accepted: July 19, 2023; Published: November 21, 2023

How to cite this article: Abdelaziz Nasr, Numerical study of evaporating wavy laminar falling film on a heated inclined channel, JP Journal of Heat and Mass Transfer 36 (2023), 37-58. http://dx.doi.org/10.17654/0973576323051

This Open Access Article is Licensed under Creative Commons Attribution 4.0 International License

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