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Some Results Based on Near-wall Turbulence

 

作者: H.D. PASINATO,  

 

期刊: International Journal of Computational Fluid Dynamics  (Taylor Available online 2000)
卷期: Volume 14, issue 2  

页码: 159-169

 

ISSN:1061-8562

 

年代: 2000

 

DOI:10.1080/10618560008940721

 

出版商: Taylor & Francis Group

 

关键词: Near-wall turbulence;Turbulence modeling;Incompressible flow

 

数据来源: Taylor

 

摘要:

In this paper some results based on the near-wall mean characteristics of a bounded turbulent flow are presented. In the study empirical polynomials and experimental data for an attached wall-bounded flow are used with the objective of studying the time-scales similarities in the very-near-wall region. As a result of this analysis a new parameter to characterize the high to low-Reynolds turbulence transition in the context of turbulence models is proposed. A relation for the Reynolds stress in the buffer region is also proposed, which allows a mean velocity profile through the buffer region to be obtained. This mean velocity profile joins the logarithmic ones at the beginning of the inertial sub-layer and fits appropriately to experimental data. Another result derived from the previous analysis is an expression for the eddy viscosity through the very-near-wall region. Comparison of this expression with those relations used by four known low-Reynolds models reveals that it has a very good performance.

 

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