A solution to Stefan problem using Eulerian two-fluid VOF model

Znanstveni rad - Izvorni znanstveni rad

• Autor: Alen Cukrov
• Autor: Yohei Sato https://orcid.org/0000-0001-5313-5767
• Autor: Ivanka Boras
• Autor: Bojan Ničeno https://orcid.org/0000-0002-8583-1684
• Autorova ustanova: Sveučilište u Zagrebu; Fakultet strojarstva i brodogradnje; (Zavod za termodinamiku, toplinsku i procesnu tehniku); (Katedra za tehničku termodinamiku)
• Znanstveno / umjetničko područje, polje i grana: TEHNIČKE ZNANOSTI; Strojarstvo; Procesno energetsko strojarstvo

Sažetak (engleski)

A novel approach for the solution of Stefan problem within the framework of the multi fluid model supplemented with Volume of Fluid (VOF) method, i.e. two-fluid VOF, is presented in this paper. The governing equation set is comprised of mass, momentum and energy conservation equations, written on a per phase basis and supplemented with closure models via the source terms. In our method, the heat and mass transfer is calculated from the heat transfer coefficient, which has a fictitious function and depends on the local cell size and the thermal conductivity, and the implementation is straightforward because of the usage of the local value instead of a global parameter. The interface sharpness is ensured by the application of the geometrical reconstruction scheme implemented in VOF. The model is verified for three types of computational meshes including triangular cells, and good agreement was obtained for the interface position and the temperature field. Although the developed method was validated only for Stefan problem, the application of the method to engineering problems is considered to be straightforward since it is implemented to a commercial CFD code only using a local value; especially in the field of naval hydrodynamics wherein the reduction of ship resistance using boiling flow can be computed efficiently since the method handles phase change processes using low resolution meshes.

• Ključne riječi (engleski): Stefan problem; two fluid VOF; locally imposed closures; boiling flow; mesh versatility
• Jezik: hrvatski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Brodogradnja
• Brojčani podaci: vol. 72, br. 4, str. 141-164
• BPC: 350 EUR
• p-ISSN: 0007-215X
• e-ISSN: 1845-5859
• DOI: https://doi.org/10.21278/brod72408
• URN:NBN: urn:nbn:hr:235:444442
• Datum objave publikacije: 2021-12-31
• URL dokumenta: https://hrcak.srce.hr/file/389045
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Datum i vrijeme pohrane: 2024-04-15 12:41:17