Dissimilar turbulent momentum and heat transfer associated with viscoelastic vibration in channel flow

Shumpei Hara; Kana Watanabe; Yuichi Kaiho; Takahiro Tsukahara; Yasuo Kawaguchi

doi:10.1016/j.ijheatmasstransfer.2023.123991

Dissimilar turbulent momentum and heat transfer associated with viscoelastic vibration in channel flow

Shumpei Hara, Kana Watanabe, Yuichi Kaiho, Takahiro Tsukahara, Yasuo Kawaguchi

Department of Mechanical and Aerospace Engineering

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

5 Citations (Scopus)

Abstract

This experimental study on the momentum and heat transfer in drag-reducing turbulent channel flow of surfactant solution, i.e., viscoelastic fluid, has revealed a viscoelastic vibration (VEV) as a novel type of ordered turbulent motion in the wall vicinity where the elastic energy is transformed into turbulent kinetic energy. The VEV is a wave-like motion of low-frequency modes in the streamwise direction and causes zero average Reynolds shear stress. However, thermal diffusion occurs continuously due to the movement of a fluid lump owing to the VEV via the additional action of pressure.

Original language	English
Article number	123991
Journal	International Journal of Heat and Mass Transfer
Volume	207
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2023.123991
Publication status	Published - 15 Jun 2023

Keywords

Dissimilarity
Drag reduction
Heat transfer reduction
Turbulent flow
Viscoelastic fluid

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10.1016/j.ijheatmasstransfer.2023.123991

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title = "Dissimilar turbulent momentum and heat transfer associated with viscoelastic vibration in channel flow",

abstract = "This experimental study on the momentum and heat transfer in drag-reducing turbulent channel flow of surfactant solution, i.e., viscoelastic fluid, has revealed a viscoelastic vibration (VEV) as a novel type of ordered turbulent motion in the wall vicinity where the elastic energy is transformed into turbulent kinetic energy. The VEV is a wave-like motion of low-frequency modes in the streamwise direction and causes zero average Reynolds shear stress. However, thermal diffusion occurs continuously due to the movement of a fluid lump owing to the VEV via the additional action of pressure.",

keywords = "Dissimilarity, Drag reduction, Heat transfer reduction, Turbulent flow, Viscoelastic fluid",

author = "Shumpei Hara and Kana Watanabe and Yuichi Kaiho and Takahiro Tsukahara and Yasuo Kawaguchi",

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year = "2023",

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doi = "10.1016/j.ijheatmasstransfer.2023.123991",

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T1 - Dissimilar turbulent momentum and heat transfer associated with viscoelastic vibration in channel flow

AU - Hara, Shumpei

AU - Watanabe, Kana

AU - Kaiho, Yuichi

AU - Tsukahara, Takahiro

AU - Kawaguchi, Yasuo

PY - 2023/6/15

Y1 - 2023/6/15

N2 - This experimental study on the momentum and heat transfer in drag-reducing turbulent channel flow of surfactant solution, i.e., viscoelastic fluid, has revealed a viscoelastic vibration (VEV) as a novel type of ordered turbulent motion in the wall vicinity where the elastic energy is transformed into turbulent kinetic energy. The VEV is a wave-like motion of low-frequency modes in the streamwise direction and causes zero average Reynolds shear stress. However, thermal diffusion occurs continuously due to the movement of a fluid lump owing to the VEV via the additional action of pressure.

AB - This experimental study on the momentum and heat transfer in drag-reducing turbulent channel flow of surfactant solution, i.e., viscoelastic fluid, has revealed a viscoelastic vibration (VEV) as a novel type of ordered turbulent motion in the wall vicinity where the elastic energy is transformed into turbulent kinetic energy. The VEV is a wave-like motion of low-frequency modes in the streamwise direction and causes zero average Reynolds shear stress. However, thermal diffusion occurs continuously due to the movement of a fluid lump owing to the VEV via the additional action of pressure.

KW - Dissimilarity

KW - Drag reduction

KW - Heat transfer reduction

KW - Turbulent flow

KW - Viscoelastic fluid

UR - http://www.scopus.com/inward/record.url?scp=85149362027&partnerID=8YFLogxK

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DO - 10.1016/j.ijheatmasstransfer.2023.123991

M3 - Article

AN - SCOPUS:85149362027

SN - 0017-9310

VL - 207

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

M1 - 123991

ER -

Dissimilar turbulent momentum and heat transfer associated with viscoelastic vibration in channel flow

Abstract

Keywords

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