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http://dx.doi.org/10.3795/KSME-B.2004.28.4.467

Large-Eddy Simulation of Turbulent Flow in a Concentric Annulus with Rotation of the Inner Cylinder  

Chung, Seo-Yoon (한국과학기술원 기계공학과)
Sung, Hyung-Jin (한국과학기술원 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.28, no.4, 2004 , pp. 467-474 More about this Journal
Abstract
A large-eddy simulation is performed for turbulent flow in a concentric annulus with the inner wall rotation at Re$\sub$Dh/=8900 for three rotation rates N=0.2145, 0.429 and 0.858. Main emphasis is placed on the inner wall rotation effect on near-wall turbulent structures. Near-wall turbulent structures close to the inner wall are scrutinized by computing the lower-order statistics. The anisotropy invariant map for the Reynolds stress tensor and the invariant function are illustrated to reveal the altered anisotropy in turbulent structure. Probability density functions of the splat/anti-splat process are explored to develop a sufficiently complete picture of the contributions of the flow events to turbulent production. The present numerical results show that the altered turbulent structures may be attributed to the centrifugal instability, which leads to the augmentation of sweep and ejection events.
Keywords
Large Eddy Simulation; Concentric Annulus; Turbulent Rotating Flow; Centrifugal Instability;
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