Pregled bibliografske jedinice broj: 1016853
Implicitly coupled phase fraction equations for the Eulerian multi-fluid model
Implicitly coupled phase fraction equations for the Eulerian multi-fluid model // Computers & fluids, 192 (2019), 104277, 14 doi:10.1016/j.compfluid.2019.104277 (međunarodna recenzija, članak, ostalo)
CROSBI ID: 1016853 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Implicitly coupled phase fraction equations for
the
Eulerian multi-fluid model
Autori
Keser, Robert ; Vukčević, Vuko ; Battistoni, Michele ; Im, Hong ; Jasak, Hrvoje
Izvornik
Computers & fluids (0045-7930) 192
(2019);
104277, 14
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, ostalo
Ključne riječi
Finite volume method ; Multiphase flow ; Eulerian multi-fluid model ; Implicit coupling ; OpenFOAM
Sažetak
In this work, the implementation, verification and validation of an implicitly coupled solution procedure for the phase fraction equations in the Eulerian multi-fluid model are presented. The model is implemented within the foam- extendtoolbox, a community-driven fork of OpenFOAM. The implicitly coupled system for an arbitrary number of phases is based on the modified formulation of the phase fraction equation. This formulation takes advantage of the mixture divergence-free velocity and the cross- coupling with the remaining phase fraction equations via the non-linear relative velocity term. The linearised and implicitly coupled phase-fraction equations are solved simultaneously within a single block matrix. The model is tested for a bubbly air-water upward flow which forms a mixing layer inside a square duct. In the first test, the mesh verification analysis is performed on structured grids with different levels of refinement. The second test investigates the influence of the number of bubble phases on the flow solution for the same flow conditions. In the third test, the implemented model is validated against experimental data from the literature. The last test compares the performance of the implemented implicitly coupled solution procedure for the phase fraction equations against the standard segregated implementation. The proposed method shows good agreement with experimental data, and has proven to be consistent both in terms of the number of phases and grid refinement. Furthermore, the method improved the convergence of the solution for flows at higher bubble phase fraction.
Izvorni jezik
Engleski
Znanstvena područja
Strojarstvo
POVEZANOST RADA
Projekti:
HRZZ-DOK-2018-01-6054 - Neonikotinoidi i bakar u mediteranskoj poljoprivredi – učinci na neciljanu faunu beskralješnjaka kroz trofičke interakcije (MEDITERATRI) (Šerić Jelaska, Lucija, HRZZ - 2018-01) ( CroRIS)
Ustanove:
Fakultet strojarstva i brodogradnje, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
