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

被引：2

作者：

Hara, Shumpei ^{[1
]}

Watanabe, Kana ^{[2
]}

Kaiho, Yuichi ^{[2
]}

Tsukahara, Takahiro ^{[2
]}

Kawaguchi, Yasuo ^{[2
]}

机构：

[1] Doshisha Univ, Dept Mech Engn, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto, Japan

[2] Tokyo Univ Sci, Dept Mech Engn, 2641 Yamazaki, Noda, Chiba 2788510, Japan

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2023年 / 207卷

关键词：

Turbulent flow; Drag reduction; Heat transfer reduction; Viscoelastic fluid; Dissimilarity; LARGE-SCALE MOTIONS; REYNOLDS-NUMBER; SURFACTANT SOLUTION; DRAG REDUCTION; LAYER; BIREFRINGENCE; FRICTION;

D O I：

10.1016/j.ijheatmasstransfer.2023.123991

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

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.(c) 2023 Elsevier Ltd. All rights reserved.

引用

页数：9

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