CAS OpenIR
Bubble induced turbulence model improved by direct numerical simulation of bubbly flow
Feng, Xin1,2; Yang, Chao1,2; Mao, Zai-Sha1; Lu, Jiacai3; Tryggvason, Gretar3
2019-12-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume377Pages:11
Abstract

Direct numerical simulations (DNS) provide a description of turbulent flow fields at every point in space and time. Since every statistical quantity can be computed, this data should be useful for the development of closure models. In this paper, models for bubbly turbulent flows, in a two-fluid framework, are investigated using DNS data. A front tracking method is employed to simulate turbulent flow with deformable bubbles in a vertical channel. Quantities such as void fraction, average velocities, velocity fluctuations, and turbulence statistics are computed and presented. After processing the DNS data, the turbulence kinetic energy and dissipation equations, based on the kappa-epsilon model and explicit algebraic stress model (EASM), are analyzed. The model for bubble-induced turbulence, represented by source terms in the kappa and epsilon equations, is re-evaluated using coefficients derived from the DNS results. This work is a first step to show what can be done by using the DNS data to evaluate turbulence closure models. More simulations should be conducted in future works to further improve such models.

KeywordDirect Numerical Simulation Bubbly Flow Turbulence Models Two-fluid Model Explicit Algebraic Stress Model
DOI10.1016/j.cej.2018.09.162
Language英语
WOS KeywordGas-liquid Flow ; Stirred-tank ; Identification ; Lift
Funding ProjectNational Key Research and Development Program[2016YFB0301701] ; National Natural Science Foundation of China[21776282] ; National Natural Science Foundation of China[21427814] ; Li Foundation
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationNational Key Research and Development Program ; National Natural Science Foundation of China ; Li Foundation
WOS IDWOS:000489122300083
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/31146
Collection中国科学院过程工程研究所
Corresponding AuthorTryggvason, Gretar
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA
Recommended Citation
GB/T 7714
Feng, Xin,Yang, Chao,Mao, Zai-Sha,et al. Bubble induced turbulence model improved by direct numerical simulation of bubbly flow[J]. CHEMICAL ENGINEERING JOURNAL,2019,377:11.
APA Feng, Xin,Yang, Chao,Mao, Zai-Sha,Lu, Jiacai,&Tryggvason, Gretar.(2019).Bubble induced turbulence model improved by direct numerical simulation of bubbly flow.CHEMICAL ENGINEERING JOURNAL,377,11.
MLA Feng, Xin,et al."Bubble induced turbulence model improved by direct numerical simulation of bubbly flow".CHEMICAL ENGINEERING JOURNAL 377(2019):11.
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