IMECH-IR  > 力学所知识产出(1956-2008)
NUMERICAL STUDY OF BLUFF-BODY FLOW STRUCTURES
Ling GC(凌国灿); LING, GC (reprint author), CHINESE ACAD SCI,INST MECH,NONLINEAR MECH LAB,BEIJING 100080,PEOPLES R CHINA.
Source PublicationSADHANA-ACADEMY PROCEEDINGS IN ENGINEERING SCIENCES
1993
Conference Name5TH ASIAN CONGRESS OF FLUID MECHANICS
Conference DateAUG 10-14, 1992
Conference PlaceTAEJON, SOUTH KOREA
AbstractOur recent progress in numerical studies of bluff body flow structures and a new method for the numerical analysis of near wake flow field for high Reynolds number flow are introduced. The paper consists of three parts. In part one, the evolution of wake vortex structure and variation of forces on a flat plate in harmonic oscillatory flows and in in-line steady-harmonic combined flows are presented by an improved discrete vortex method, as the Keulegan-Carpenter number (KC) varies from 2 to 40 and ratios of U-m to U-0 are of O(10(-1)), O(10) and O(10), respectively. In part 2, a domain decomposition hybrid method, combining the finite-difference and vortex methods for numerical simulation of unsteady viscous separated flow around a bluff body, is introduced. By the new method, some high resolution numerical visualization on near wake evolution behind a circular cylinder at Re = 10(2), 10(3) and 3 x 10(3) are shown. In part 3, the mechanism and the dynamic process for the three-dimensional evolution of the Karman vortex and vortex filaments in braid regions as well as the early features of turbulent structure in the wake behind a circular cylinder are presented numerically by the vortex dynamics method.
WOS IDWOS:A1993MH82200012
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Indexed ByCPCI-S
Language英语
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Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59019
Collection力学所知识产出(1956-2008)
Corresponding AuthorLING, GC (reprint author), CHINESE ACAD SCI,INST MECH,NONLINEAR MECH LAB,BEIJING 100080,PEOPLES R CHINA.
Recommended Citation
GB/T 7714
Ling GC,LING, GC . NUMERICAL STUDY OF BLUFF-BODY FLOW STRUCTURES[C]. BANGALORE, P B 8005 C V RAMAN AVENUE, BANGALORE 560 080, INDIA:INDIAN ACADEMY SCIENCES,1993.
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