Yasaman Tohidi, Scott J. Ormiston

Abstract: This study numerically investigates the fluid flow and thermal characteristics of falling film evaporation over a horizontal tube. Water film in the vicinity of a co-current air flow flows over an isothermal tube surface. A two-dimensional two-phase laminar flow model is employed for modelling evaporation using an in-house Fortran code. A sharp interface method is used to determine the liquid gas interface. A finite volume approach was employed to discretise a set of elliptic governing equations. The results are validated against previous studies. Results, obtained from a particular test case, including film thickness, interfacial temperature, local heat transfer coefficient, and total evaporated mass are presented and discussed.

Keywords: Numerical method, Evaporation, Two-phase, Horizontal tube, Elliptic equations.

Date Published: July 28, 2025
DOI: 10.11159/jffhmt.2025.027

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