| Simulation of droplet entrainment in annular flow with a morphology adaptive multifield two-fluid model | |
Wang LS(王黎松); Krull, Benjamin; Lucas, Dirk; Meller, Richard; Schlegel, Fabian; Tekavcic, Matej; Xu JY(许晶禹)
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| Corresponding Author | Schlegel, Fabian([email protected]) ; Xu, Jing-Yu([email protected]) |
| Source Publication | PHYSICS OF FLUIDS
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| 2023-10-01 | |
| Volume | 35Issue:10Pages:16 |
| ISSN | 1070-6631 |
| Abstract | Modeling of annular flow with the computational fluid dynamics (CFD) is challenging as one has to consider several, rather different, phenomena simultaneously: the continuous liquid film, continuous gas core, and dispersed droplets. A morphology-adaptive multifield two-fluid model (MultiMorph) developed by Meller et al. ["Basic verification of a numerical framework applied to a morphology adaptive multifield two-fluid model considering bubble motions," Int. J. Numer. Methods Fluids 93(3), 748-773 (2021)], with three numerical phase fields, is well suited to simulate such multiple flow structures. Droplet formation plays an important role in annular flow, and a new droplet entrainment model is proposed, expressed as a phase morphology transfer term from the continuous liquid film to dispersed droplets phase field. The new model is developed based on the shear-off entrainment mechanism on the interfacial wave, implying that the droplet formation is dominated by the balance between the shear forces and the surface tension forces at the gas-liquid interface. In contrast to the existing entrainment models, the new model considers the flow parameters locally at the interface, and it is suitable for phase-resolving CFD frameworks without input of global parameters such as a pipe diameter. The proposed model is implemented in the MultiMorph framework based on the OpenFOAM Foundation release open-source CFD library. The performance of the new model is evaluated by conducting own annular flow experiments with void fraction measurements using electrical resistance tomography, as well as with comparison to published models from the literature. Qualitatively, the model can adequately resolve the formation of interfacial waves on the liquid film downstream from the inlet. The simulated droplets are primarily generated at the tip of such waves, which is consistent with the physical understanding and experimental observations of droplet entrainment. Quantitatively, the modeled entrained droplet fraction matches well the experimental observation in the developing entrainment region. The liquid film fraction obtained with the new model is analyzed and compared with the experimental data. Good agreement between measured and simulated statistics of the liquid film fraction, i.e., the mean, standard deviation, probability density function, and power spectral density, is demonstrated. |
| DOI | 10.1063/5.0169288 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001084581200017 |
| WOS Keyword | 2-PHASE FLOW ; NUMERICAL-SIMULATION ; DEPOSITION |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | This work was supported by the Helmholtz European Partnering Program in the project Crossing borders and scales (Crossing), the National Natural Science Foundation of China (Grant No. 51779243), the Strategic Priority Research Program of the Chinese Academ ; Helmholtz European Partnering Program[51779243] ; National Natural Science Foundation of China[XDB22030101] ; Strategic Priority Research Program of the Chinese Academy of Science[12102436] ; National Natural Science Foundation of China Youth Fund Project[P2-0026] ; Slovenian Research Agency ; Chinese Academy of Sciences (CAS) ; Deutscher Akademischer Austauschdienst (DAAD) |
| Funding Organization | This work was supported by the Helmholtz European Partnering Program in the project Crossing borders and scales (Crossing), the National Natural Science Foundation of China (Grant No. 51779243), the Strategic Priority Research Program of the Chinese Academ ; Helmholtz European Partnering Program ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Science ; National Natural Science Foundation of China Youth Fund Project ; Slovenian Research Agency ; Chinese Academy of Sciences (CAS) ; Deutscher Akademischer Austauschdienst (DAAD) |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Contributor | Schlegel, Fabian ; Xu, Jing-Yu |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/93298 |
| Collection | 流固耦合系统力学重点实验室 |
| Recommended Citation GB/T 7714 | Wang LS,Krull, Benjamin,Lucas, Dirk,et al. Simulation of droplet entrainment in annular flow with a morphology adaptive multifield two-fluid model[J]. PHYSICS OF FLUIDS,2023,35,10,:16.Rp_Au:Schlegel, Fabian, Xu, Jing-Yu |
| APA | 王黎松.,Krull, Benjamin.,Lucas, Dirk.,Meller, Richard.,Schlegel, Fabian.,...&许晶禹.(2023).Simulation of droplet entrainment in annular flow with a morphology adaptive multifield two-fluid model.PHYSICS OF FLUIDS,35(10),16. |
| MLA | 王黎松,et al."Simulation of droplet entrainment in annular flow with a morphology adaptive multifield two-fluid model".PHYSICS OF FLUIDS 35.10(2023):16. |
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| Jp2023A210.pdf（4949KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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