Domain decomposition hybrid method for numerical simulation of bluff body flows:theoretical model and application

IMECH-IR > 力学所知识产出(1956-2008)

	Domain decomposition hybrid method for numerical simulation of bluff body flows:theoretical model and application
	Ling GC(凌国灿); Ling GP; Wang YP(王运平)
发表期刊	Science in China Series A-Mathematics Physics Astronomy
	1992
卷号	35 期号:8 页码:977-990
ISSN	1001-6511
摘要	The discrete vortex method is not capable of precisely predicting the bluff body flow separation and the fine structure of flow field in the vicinity of the body surface. In order to make a theoretical improvement over the method and to reduce the difficulty in finite-difference solution of N-S equations at high Reynolds number, in the present paper, we suggest a new numerical simulation model and a theoretical method for domain decomposition hybrid combination of finite-difference method and vortex method. Specifically, the full flow. field is decomposed into two domains. In the region of O(R) near the body surface (R is the characteristic dimension of body), we use the finite-difference method to solve the N-S equations and in the exterior domain, we take the Lagrange-Euler vortex method. The connection and coupling conditions for flow in the two domains are established. The specific numerical scheme of this theoretical model is given. As a preliminary application, some numerical simulations for flows at Re=100 and Re-1000 about a circular cylinder are made, and compared with the finite-difference solution of N-S equations for full flow field and experimental results, and the stability of the solution against the change of the interface between the two domains is examined. The results show that the method of the present paper has the advantage of finite-difference solution for N-S equations in precisely predicting the fine structure of flow field, as well as the advantage of vortex method in efficiently computing the global characteristics of the separated flow. It saves computer time and reduces the amount of computation, as compared with pure N-S equation solution. The present method can be used for numerical simulation of bluff body flow at high Reynolds number and would exhibit even greater merit in that case.
关键词	Domain Decomposition Hybrid Method Finite-difference Method Vortex Method Numerical Simulation Circular Cylinder-separated Flow Started Circular-cylinder
收录类别	SCI
语种	英语
WOS记录号	WOS:A1992JV65100008
WOS研究方向	Mathematics
WOS类目	Mathematics, Applied ; Mathematics
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/39436
专题	力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Ling GC,Ling GP,Wang YP. Domain decomposition hybrid method for numerical simulation of bluff body flows:theoretical model and application[J]. Science in China Series A-Mathematics Physics Astronomy,1992,35,8,:977-990.
APA	凌国灿,Ling GP,&王运平.(1992).Domain decomposition hybrid method for numerical simulation of bluff body flows:theoretical model and application.Science in China Series A-Mathematics Physics Astronomy,35(8),977-990.
MLA	凌国灿,et al."Domain decomposition hybrid method for numerical simulation of bluff body flows:theoretical model and application".Science in China Series A-Mathematics Physics Astronomy 35.8(1992):977-990.

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