Reduction of eddy diffusion for momentum and heat in viscoelastic fluid flow in a circular tube
作者:
Tokuro Mizushina,
Hiromoto Usui,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1977)
卷期:
Volume 20,
issue 10
页码: 100-108
ISSN:0031-9171
年代: 1977
DOI:10.1063/1.861717
出版商: AIP
数据来源: AIP
摘要:
The velocity profile, longitudinal turbulent intensity profile, and bursting period in drag reducing pipe flow were measured using a laser Doppler technique. The temperature distribution and heat transfer coefficient were measured with thermocouples in the same system. The results of the decrease in eddy diffusivities of momentum and heat near the wall, the gross flow measurements, and the velocity distribution were shown to be in a good agreement with the predictions of the eddy diffusivity model for viscoelastic fluids previously proposed. A simple method based on the eddy diffusivity model to calculate the rate of heat transfer in the fully developed pipe flow of viscoelastic fluids is proposed, and is ascertained to be effective by the previous experiments.
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