DNS study on heat transfer of viscoelastic decaying isotropic turbulence

Wenhua Zhang; Qiyu Huang; Bo Yu; Jingjing Chen; Jinjia Wei; Dongliang Sun; Yasuo Kawaguchi; Jingfa Li

doi:10.1016/j.ijheatfluidflow.2017.08.014

DNS study on heat transfer of viscoelastic decaying isotropic turbulence

Wenhua Zhang
, Qiyu Huang
, Bo Yu
, Jingjing Chen
, Jinjia Wei
, Dongliang Sun
, Yasuo Kawaguchi
, Jingfa Li

School of Chemical Engineering and Technology

Research output: Contribution to journal › Article › peer-review

Abstract

Direct numerical simulation (DNS) on viscoelastic decaying isotropic turbulence was carried out to investigate heat transfer reduction (HTR) mechanism. The transport equations of thermal fluctuation energy and heat flux were derived in both physical space and Fourier space. The effects of viscoelasticity on the transport equations were studied to analyze the mechanism of thermal fluctuation reduction and HTR. Statistics and Fourier space distributions of turbulent kinetic energy, thermal fluctuation energy, and turbulent heat flux of viscoelastic fluid were presented, and compared with those in Newtonian fluid. The effects of viscoelasticity on turbulent and thermal fluctuations were illustrated intuitively via curvelet method.

Original language	English
Pages (from-to)	240-249
Number of pages	10
Journal	International Journal of Heat and Fluid Flow
Volume	67
DOIs	https://doi.org/10.1016/j.ijheatfluidflow.2017.08.014
State	Published - Oct 2017

Keywords

Heat transfer reduction
Isotropic turbulence
Viscoelastic fluid

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10.1016/j.ijheatfluidflow.2017.08.014

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title = "DNS study on heat transfer of viscoelastic decaying isotropic turbulence",

abstract = "Direct numerical simulation (DNS) on viscoelastic decaying isotropic turbulence was carried out to investigate heat transfer reduction (HTR) mechanism. The transport equations of thermal fluctuation energy and heat flux were derived in both physical space and Fourier space. The effects of viscoelasticity on the transport equations were studied to analyze the mechanism of thermal fluctuation reduction and HTR. Statistics and Fourier space distributions of turbulent kinetic energy, thermal fluctuation energy, and turbulent heat flux of viscoelastic fluid were presented, and compared with those in Newtonian fluid. The effects of viscoelasticity on turbulent and thermal fluctuations were illustrated intuitively via curvelet method.",

keywords = "Heat transfer reduction, Isotropic turbulence, Viscoelastic fluid",

author = "Wenhua Zhang and Qiyu Huang and Bo Yu and Jingjing Chen and Jinjia Wei and Dongliang Sun and Yasuo Kawaguchi and Jingfa Li",

note = "Publisher Copyright: {\textcopyright} 2017",

year = "2017",

month = oct,

doi = "10.1016/j.ijheatfluidflow.2017.08.014",

language = "英语",

volume = "67",

pages = "240--249",

journal = "International Journal of Heat and Fluid Flow",

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TY - JOUR

T1 - DNS study on heat transfer of viscoelastic decaying isotropic turbulence

AU - Zhang, Wenhua

AU - Huang, Qiyu

AU - Yu, Bo

AU - Chen, Jingjing

AU - Wei, Jinjia

AU - Sun, Dongliang

AU - Kawaguchi, Yasuo

AU - Li, Jingfa

PY - 2017/10

Y1 - 2017/10

N2 - Direct numerical simulation (DNS) on viscoelastic decaying isotropic turbulence was carried out to investigate heat transfer reduction (HTR) mechanism. The transport equations of thermal fluctuation energy and heat flux were derived in both physical space and Fourier space. The effects of viscoelasticity on the transport equations were studied to analyze the mechanism of thermal fluctuation reduction and HTR. Statistics and Fourier space distributions of turbulent kinetic energy, thermal fluctuation energy, and turbulent heat flux of viscoelastic fluid were presented, and compared with those in Newtonian fluid. The effects of viscoelasticity on turbulent and thermal fluctuations were illustrated intuitively via curvelet method.

AB - Direct numerical simulation (DNS) on viscoelastic decaying isotropic turbulence was carried out to investigate heat transfer reduction (HTR) mechanism. The transport equations of thermal fluctuation energy and heat flux were derived in both physical space and Fourier space. The effects of viscoelasticity on the transport equations were studied to analyze the mechanism of thermal fluctuation reduction and HTR. Statistics and Fourier space distributions of turbulent kinetic energy, thermal fluctuation energy, and turbulent heat flux of viscoelastic fluid were presented, and compared with those in Newtonian fluid. The effects of viscoelasticity on turbulent and thermal fluctuations were illustrated intuitively via curvelet method.

KW - Heat transfer reduction

KW - Isotropic turbulence

KW - Viscoelastic fluid

UR - https://www.scopus.com/pages/publications/85028971833

U2 - 10.1016/j.ijheatfluidflow.2017.08.014

DO - 10.1016/j.ijheatfluidflow.2017.08.014

M3 - 文章

AN - SCOPUS:85028971833

SN - 0142-727X

VL - 67

SP - 240

EP - 249

JO - International Journal of Heat and Fluid Flow

JF - International Journal of Heat and Fluid Flow

ER -

DNS study on heat transfer of viscoelastic decaying isotropic turbulence

Abstract

Keywords

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