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Numerical investigation of spatial and temporal structure of annular flow with disturbance waves
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Engineering.ORCID iD: 0000-0002-4038-4120
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Engineering.
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Engineering. Warsaw Univ Technol, Inst Heat Engn, 21-25 Nowowiejska St, PL-00665 Warsaw, Poland..ORCID iD: 0000-0001-5595-1952
2019 (English)In: International Journal of Multiphase Flow, ISSN 0301-9322, E-ISSN 1879-3533, Vol. 110, p. 256-272Article in journal (Refereed) Published
Abstract [en]

Droplet entrainment is a crucial process for annular flow in terms of heat and mass transfer. Disturbance wave is believed to be a fundamental phenomenon which is closely related to entrainment. A 3D numerical simulation on disturbance waves and entrainment is carried out by using volume of fluid (VOF) method where no periodic boundary condition is used. Since VOF tracks the interface implicitly, a systematic method is developed for post-processing, with which disturbance waves. ripples, base film, and entrainment process are clearly visualized, and the stochastic and chaotic nature of two-phase flow is confirmed. Surfacewise distributions are generated for main wave parameters, and the streamwise developments of such quantities are shown to be consistent with experimental observations. Predictions for main wave parameters are in reasonable agreement with the experiment and empirical correlations. Current work shows the capability and promising application of investigating disturbance waves and entrainment with VOF method.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 110, p. 256-272
Keywords [en]
Disturbance wave, Entrainment, VOF, Periodic boundary
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-240699DOI: 10.1016/j.ijmultiphaseflow.2018.10.003ISI: 000452945400019Scopus ID: 2-s2.0-85054441195OAI: oai:DiVA.org:kth-240699DiVA, id: diva2:1277445
Note

QC 20190110

Available from: 2019-01-10 Created: 2019-01-10 Last updated: 2019-11-18Bibliographically approved

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Anglart, Henryk

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