Naslov
CFD simulation of wall wetting with the volume of fluid and thin liquid film approach

Autori
Mačak, Jelena

Vrsta, podvrsta i kategorija rada
Ocjenski radovi, diplomski rad, diplomski

Fakultet
Fakultet strojarstva i brodogradnje

Mjesto
Zagreb

Datum
12.07

Godina
2018

Stranica
110

Mentor
Jasak, Hrvoje

Ključne riječi
wetting ; contact angle ; Volume of Fluid ; thin liquid film model ; CFD ; foam-extend

Sažetak
The focus of this thesis is the numerical modelling of liquid-wall interaction, also referred to as wetting. Wetting is an important part of many industrial applications, and, for aerospace industry, it is relevant as it relates to hazardous ice accretions. Numerical study of the phenomenon could lead to safety improvements and cost reductions, which was the motivation behind the thesis. This thesis examines the feasibility of wall wetting simulations by means of Computational Fluid Dynamics (CFD), using two model formulations: a 3-D two-fluid free surface Volume of Fluid (VoF) flow model and a 2-D thin liquid film model. Both are implemented within the CFD toolbox foam-extend. Implementation of wetting was performed within the VoF interFoam solver and within the thin liquid film liquidFilmFoam solver. In interFoam, wetting is realized using a boundary condition, while in liquidFilmFoam, an additional force term was added into the momentum equation, resulting in a new mathematical formulation. The VoF boundary condition was tested using an experiment related to droplet deposition on an inclined plate. Thin liquid film model was tested using experimental and numerical data related to rivulet flows. Methods were compared using a case of droplet exposed to shear flow on an inclined plate.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA