A Study on Three-Dimensionality of Turbulent Heat Transfer in a Channel : (Eduction of Coherent Structures by a Conditional Sampling Technique)

松原, 幸治
小林, 睦夫
坂井, 隆浩
須藤, 仁
Matsubara, Koji
Kobayashi, Mutsuo
Sakai, Takahiro
Suto, Hitoshi

Open link

Publication date

May 2000

Publisher

日本機械学会

Journal

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B

Abstract

Coherent structures near the wall (y^+<60)in a turbulent channel flow were educed by a conditional sampling technique from the DNS data for two kinds of temperature fields : (a) the uniform heat flux assigned on the two walls (UHF) and (b) the constant spanwise mean temperature gradient imposed on the working fluid (STG). Attention was paid for roles of the quasi-streamwise vortex in heat transfer mechanisms. Flow and temperature fields around the quasi-streamwise vortex have basically two-dimensional structure. In the case of UHF, temperature fluctuation is high at right-and left-sides of the vortex core where the rotating flow motion due to the vortex has a wallnormal component. In STG, large value of the temperature fluctuation was obser...

Extracted data

We use cookies to provide a better user experience.

Data Protection

A Study on Three-Dimensionality of Turbulent Heat Transfer in a Channel : (Eduction of Coherent Structures by a Conditional Sampling Technique)

Abstract

Extracted data

A Study on Three-Dimensionality of Turbulent Heat Transfer in a Channel : (Eduction of Coherent Structures by a Conditional Sampling Technique)

Abstract

Extracted data

Related items

Related items