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Title:
The dual information preserving method for stiff reacting flows
Author: Liu, Li; Shen YQ(申义庆); Liu ShengPing(刘升平); Yu, Ming
Source: COMPUTERS & FLUIDS
Issued Date: 2017-11-03
Volume: 157, Pages:253-275
Abstract: In this paper, we construct a new numerical method to solve the reactive Euler equations to cure the numerical stiffness problem. The species mass equations are first decoupled from the reactive Euler equations, and then they are further fractionated into the convection step and the reaction step. In the convection step, by introducing two kinds of Lagrangian points (cell-point and particle-point), a dual information preserving (DIP) method is proposed to resolve the convection characteristics. In this new method, the information (including the transport value and the relative coordinates to the center of the current cell) of the cell-point and that of the particle-point are updated according to the velocity field. The information of the cell-point in a cell can effectively restrict the incorrect reaction activation caused by the numerical dissipation, while the information of the particle-point can help to preserve the sharp shock front once the strong shock waves are formed. Hence, by using the DIP method, the spurious numerical propagation phenomenon in stiff reacting flows is effectively eliminated. In addition, a numerical perturbation method is also developed to solve the fractional reaction step (ODE equation) to improve the stability and efficiency. A series of numerical examples are presented to validate the accuracy and robustness of the new method. (C) 2017 Elsevier Ltd. All rights reserved.
Keyword: Stiff reacting flow ; Dual information preserving method ; Numerical perturbation method ; Shock-capturing scheme
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Shen, YQ (reprint author), Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China.
Correspondent Email: yqshen@imech.ac.cn
DOI: 10.1016/j.compfluid.2017.09.001
DOC Type: Article
WOS ID: WOS:000413380300018
ISSN: 0045-7930
Funder: This research work was supported by NSAF U1530145, 2016YFA0401200, NSFC No. 11272325 and 11272324.
Department: LHD气动布局优化与计算方法
Classification: 二类/Q1
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/60935
Appears in Collections:高温气体动力学国家重点实验室_期刊论文

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Recommended Citation:
Liu, Li,Shen YQ,Liu, Shengping,et al. The dual information preserving method for stiff reacting flows[J]. COMPUTERS & FLUIDS,2017-11-03,157:253-275.
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