Bubble induced turbulence model improved by direct numerical simulation of bubbly flow
文献类型：期刊论文
| 作者 | Feng, Xin2,3; Yang, Chao2,3; Mao, Zai-Sha2; Lu, Jiacai1; Tryggvason, Gretar1 |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2019-12-01 |
| 卷号 | 377页码:11 |
| ISSN号 | 1385-8947 |
| 关键词 | Direct numerical simulation Bubbly flow Turbulence models Two-fluid model Explicit algebraic stress model |
| DOI | 10.1016/j.cej.2018.09.162 |
| 英文摘要 | 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. |
| WOS关键词 | GAS-LIQUID FLOW ; STIRRED-TANK ; IDENTIFICATION ; LIFT |
| 资助项目 | National Key Research and Development Program[2016YFB0301701] ; National Natural Science Foundation of China[21776282] ; National Natural Science Foundation of China[21427814] ; Li Foundation |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE SA |
| WOS记录号 | WOS:000489122300083 |
| 资助机构 | National Key Research and Development Program ; National Natural Science Foundation of China ; Li Foundation |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/31145]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Tryggvason, Gretar |
| 作者单位 | 1.Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA 2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：过程工程研究所
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