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Large eddy simulation of turbulent concentric annular channel flows
Author(s) -
Liu NanSheng,
Lu XiYun
Publication year - 2004
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.740
Subject(s) - turbulence , mechanics , turbulence kinetic energy , large eddy simulation , concentric , turbulence modeling , physics , reynolds number , k epsilon turbulence model , reynolds stress , open channel flow , pipe flow , reynolds stress equation model , geometry , k omega turbulence model , mathematics
Fully developed turbulent concentric annular channel flow has been investigated numerically by use of large eddy simulation (LES) technique coupled with a localized one‐equation dynamic subgrid‐scale (SGS) model. The objective of this study is to deal with the behaviour of turbulent flow near the inner and outer walls of the concentric annular channel and to examine the effectiveness of LES technique for predicting the turbulent flow influenced by the transverse curvature effect. The computations are performed for the Reynolds number Re τ =180, 395 and 640, based on an averaged friction velocity and the annular channel width with the inner and outer cylinder radius being R i =1 and R o =2. To validate the present approach, calculated results for turbulent pipe flow and concentric annular channel flow are compared with available experimental data and direct numerical simulation results, which confirms that the present approach can be used to study turbulent concentric annular channel flow satisfactorily. To elucidate turbulence characteristics in the concentric annular channel, some typical quantities, including the resolved velocity, turbulence intensity, turbulent eddy viscosity, SGS kinetic energy, SGS dissipation rate, Reynolds stress budgets, and turbulence structures based on the velocity fluctuations, are analysed. Copyright © 2004 John Wiley & Sons, Ltd.