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What is Boiling

Chapter 9
Process Analysis, Design, and Intensification in Microfluidics and Chemical Engineering
Is a phase change phenomenon from liquid state to vapor state that occurs only at a well-defined temperature called boiling point.
Published in Chapter:
Heat and Mass Transfer Characteristics of Evaporating Falling Films: Application to Thermal Protection and Desalination
Monssif Najim (University of Ibn Zohr, Morocco), M'barek Feddaoui (University of Ibn Zohr, Morocco), Abderrahman Nait Alla (University of Ibn Zohr, Morocco), and Adil Charef (University of Ibn Zohr, Morocco)
Copyright: © 2019 |Pages: 26
DOI: 10.4018/978-1-5225-7138-4.ch009
Abstract
This chapter presents a numerical investigation of heat and mass transfer characteristics during the evaporation of liquid films in vertical geometries. A two-phase model is developed to simulate laminar film evaporation into laminar gas flow. The liquid film evaporation is evaluated under adiabatic and heated wall conditions for both pure and binary liquid film. The model is based on a finite difference method to solve the governing equations of the two phases. The obtained results concerns two industrial processes. The first part of the chapter is devoted to the analysis of the thermal protection of vertical channel wall, while the second part is devoted to the desalination process by falling liquid film. The simulations results allowed the determination of the optimal operating conditions for both processes.
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