Bubble induced turbulence model improved by direct numerical simulation of bubbly flow

doi:10.1016/j.cej.2018.09.162

	Bubble induced turbulence model improved by direct numerical simulation of bubbly flow
	Feng, Xin 2,3; Yang, Chao 2,3; Mao, Zai-Sha 2; Lu, Jiacai 1; Tryggvason, Gretar 1
刊名	CHEMICAL ENGINEERING JOURNAL
	2019-12-01
卷号	377 页码:11
关键词	Direct numerical simulation Bubbly flow Turbulence models Two-fluid model Explicit algebraic stress model
ISSN号	1385-8947
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.
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关键词	GAS-LIQUID FLOW ; STIRRED-TANK ; IDENTIFICATION ; LIFT
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
内容类型	期刊论文
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.