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master's thesis
Simulacija interakcije kapljice i zida proračunskom mehanikom fluida u formulaciji modela slobodne površine i tankog tekućeg sloja
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. urn:nbn:hr:235:919082
Mačak, Jelena
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

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Mačak, J. (2018). Simulacija interakcije kapljice i zida proračunskom mehanikom fluida u formulaciji modela slobodne površine i tankog tekućeg sloja (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:919082

Mačak, Jelena. "Simulacija interakcije kapljice i zida proračunskom mehanikom fluida u formulaciji modela slobodne površine i tankog tekućeg sloja." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. https://urn.nsk.hr/urn:nbn:hr:235:919082

Mačak, Jelena. "Simulacija interakcije kapljice i zida proračunskom mehanikom fluida u formulaciji modela slobodne površine i tankog tekućeg sloja." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. https://urn.nsk.hr/urn:nbn:hr:235:919082

Mačak, J. (2018). 'Simulacija interakcije kapljice i zida proračunskom mehanikom fluida u formulaciji modela slobodne površine i tankog tekućeg sloja', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 26 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:919082

Mačak J. Simulacija interakcije kapljice i zida proračunskom mehanikom fluida u formulaciji modela slobodne površine i tankog tekućeg sloja [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2018 [cited 2024 December 26] Available at: https://urn.nsk.hr/urn:nbn:hr:235:919082

J. Mačak, "Simulacija interakcije kapljice i zida proračunskom mehanikom fluida u formulaciji modela slobodne površine i tankog tekućeg sloja", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:235:919082

Metadata
TitleSimulacija interakcije kapljice i zida proračunskom mehanikom fluida u formulaciji modela slobodne površine i tankog tekućeg sloja
Title (english)CFD simulation of wall wetting with the volume of fluid and thin liquid film approach
AuthorJelena Mačak
MentorHrvoje Jasak (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2018-07-12, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Aviation, Rocket and Space Technology
Abstract
Ovaj rad se bavi numeričkim modeliranjem fenomena kvašenja, odnosno interakcije kapljevine i nepropusne stijenke. Kvašenje je esencijalan dio mnogih industrijskih procesa, a radi svoje poveznice sa stvaranjem leda, relevantno je za zrakoplovstvo. U zrakoplovnoj industriji, numerička simulacija fenomena bi mogla dovesti do značajnih poboljšanja na polju sigurnosti kao i do smanjenja troškova, što je bila motivacija za pisanje ovog rada. Ovaj rad istražuje mogućnosti simulacije kvašenja korištenjem proračunskih metoda računalne dinamike fluida (RDF). U radu su razmatrana dva pristupa: 3-D dvofazni model slobodne površine i 2-D formulacija tankog tekućeg sloja. Obje formulacije su implementirane unutar foam-extend softverskog paketa. Kvašenje je implementirano u 3-D rješavač interFoam i u 2-D rješavač liquidFilmFoam. U interFoam-u, kvašenje je realizirano primjenom rubnog uvjeta, dok je u liquidFilmFoam-u isto ostvareno dodavanjem sile u jednadžbu očuvanja količine gibanja, dovodeći do nove matematičke formulacije modela. Rubni uvjet modela slobodne površine je testiran usporedbom s eksperimentalnim podacima vezanim uz gibanje kapljice niz nagnutu ploču. Model tankog tekućeg sloja je testiran usporedbom s eksperimentalnim i numeričkim podacima o odvajanju struja tankog filma kapljevine. Metode su međusobno uspoređene simulacijom gibanja kapljice pogonjene strujom zraka niz nagnutu ravninu.
Abstract (english)
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.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:919082
Study programmeTitle: Aeronautical Studies
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka zrakoplovnog inženjerstva (magistar/magistra inženjer/inženjerka zrakoplovnog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2019-05-28 09:45:29