Computational study of evaporating nanofluids film along a vertical channel by the two-phase model

• Published in: International journal of mechanical sciences 2019-02, Vol.151, p.858-867
• Main Authors: Najim, Monssif, Feddaoui, M’Barek, Nait Alla, Abderrahman, Charef, Adil
• Format: Article
• Language: English
• Subjects: Binary mixture; Heat and mass transfer; Nanofluid film evaporation; Nanoparticles
• ISSN: 0020-7403; 1879-2162
• DOI: 10.1016/j.ijmecsci.2018.12.042

•Computational study of nanoparticles suspension in the liquid film evaporation process.•Effects of the ethylene glycol fraction on the evaporation process, with and without nanoparticles.•Comparison of heat and mass transfers in the case of pure water, Ag-EG-Water and Al2O3-EG-Water nanofluids.•The best enhancement of heat and mass transfer is achieved with Ag nanoparticles.•Possibility to avoid high fraction of ethylene glycol (high cost) by implementing the nanoparticles. [Display omitted] The mixture of water and ethylene glycol for heat transfer applications was for decades a good choice. In spite of that, the implementation of nanoparticles have made heat transfer fluids even better. Many previous studies assumed the base fluid and nanoparticles as a single-phase. However, two-phase models are being proposed recently. This numerical study aims to investigate the heat and mass transfer intensification of liquid film evaporation in a vertical channel by the use of nanofluids. A two-phase model is used to simulate the nanofluids. A comparison between Ag and Al2O3 nanoparticles is realised to identify the convenient nanofluid. Effects of wall heat flux, inlet liquid mass flow and nanoparticles volume fraction are examined by analysing the enhancement ratios of latent, sensible and accumulated evaporation flow rate.