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.
点击下载:
PDF (349KB)
返 回