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PIV flow measurements for a rotating square smooth channel heated by basically uniform heat flux

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PIV flow measurements for a rotating square smooth channel heated by basically uniform heat flux. / You, Ruquan; Li, Haiwang; Wu, Hongwei; Tao, Zhi .

In: International Journal of Heat and Mass Transfer, Vol. 119, 01.04.2018, p. 236-246.

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@article{6d5dd2a23859467aba4d4d646370137d,
title = "PIV flow measurements for a rotating square smooth channel heated by basically uniform heat flux",
abstract = "In this paper, we experimentally investigated the mainstream and secondary flow in a smooth rotating channel with wall heated by particle image velocimetry (PIV). The hybrid effect of Coriolis force and buoyancy force on the mainstream and secondary flow was taken into consideration in the current work. In the experiments, the Reynolds number, based on the channel hydraulic diameter (D = 80 mm) and the bulk mainstream velocity (Vm = 1.82 m/s), is 10,000, and the rotation numbers are 0, 0.13, 0.26, 0.39, respectively. Constant heat flux on the four channel walls are provided by Indium Tin Oxide (ITO) heater glass, the density ratio (d.r.) equaling approximately 0.1. The buoyancy number ranges from 0 to 0.153. The results showed that Coriolis force and buoyancy force have important influences on the flow field in rotating channels. Coriolis force pushes the mainstream to trailing side, making an asymmetry of the mainstream. On the cross-section, there is a symmetric two-vortex pair caused by the Coriolis. Thetwo-vortex pair is pushed into the trailing side with the increase of rotation numbers. Then, there are two small vortex appearing near the leading side. Buoyancy force suppresses mainstream and causes the separation of the flow near the leading side. When the separated flow happened, the structure of secondary flow is disordered near the leading side.",
keywords = "Flow dynamics, Heat transfer, Rotating channel, Secondary flow, Separated flow",
author = "Ruquan You and Haiwang Li and Hongwei Wu and Zhi Tao",
note = "This document is the Accepted Manuscript of the following article: Ruquan You, Haiwang Li, Hongwei Wu, and Zhi Tao, {\textquoteleft}PIV flow measurements for a rotating square smooth channel heated by basically uniform heat flux{\textquoteright}, International Journal of Heat and Mass Transfer, Vol. 119: 236-246, April 2018. Under embargo until 22 December 2018. The final, definitive version is available online at DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2017.11.073, published by Elsevier Ltd. ",
year = "2018",
month = apr,
day = "1",
doi = "10.1016/j.ijheatmasstransfer.2017.11.073",
language = "English",
volume = "119",
pages = "236--246",
journal = "International Journal of Heat and Mass Transfer",
issn = "0017-9310",
publisher = "Elsevier Limited",

}

RIS

TY - JOUR

T1 - PIV flow measurements for a rotating square smooth channel heated by basically uniform heat flux

AU - You, Ruquan

AU - Li, Haiwang

AU - Wu, Hongwei

AU - Tao, Zhi

N1 - This document is the Accepted Manuscript of the following article: Ruquan You, Haiwang Li, Hongwei Wu, and Zhi Tao, ‘PIV flow measurements for a rotating square smooth channel heated by basically uniform heat flux’, International Journal of Heat and Mass Transfer, Vol. 119: 236-246, April 2018. Under embargo until 22 December 2018. The final, definitive version is available online at DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2017.11.073, published by Elsevier Ltd.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - In this paper, we experimentally investigated the mainstream and secondary flow in a smooth rotating channel with wall heated by particle image velocimetry (PIV). The hybrid effect of Coriolis force and buoyancy force on the mainstream and secondary flow was taken into consideration in the current work. In the experiments, the Reynolds number, based on the channel hydraulic diameter (D = 80 mm) and the bulk mainstream velocity (Vm = 1.82 m/s), is 10,000, and the rotation numbers are 0, 0.13, 0.26, 0.39, respectively. Constant heat flux on the four channel walls are provided by Indium Tin Oxide (ITO) heater glass, the density ratio (d.r.) equaling approximately 0.1. The buoyancy number ranges from 0 to 0.153. The results showed that Coriolis force and buoyancy force have important influences on the flow field in rotating channels. Coriolis force pushes the mainstream to trailing side, making an asymmetry of the mainstream. On the cross-section, there is a symmetric two-vortex pair caused by the Coriolis. Thetwo-vortex pair is pushed into the trailing side with the increase of rotation numbers. Then, there are two small vortex appearing near the leading side. Buoyancy force suppresses mainstream and causes the separation of the flow near the leading side. When the separated flow happened, the structure of secondary flow is disordered near the leading side.

AB - In this paper, we experimentally investigated the mainstream and secondary flow in a smooth rotating channel with wall heated by particle image velocimetry (PIV). The hybrid effect of Coriolis force and buoyancy force on the mainstream and secondary flow was taken into consideration in the current work. In the experiments, the Reynolds number, based on the channel hydraulic diameter (D = 80 mm) and the bulk mainstream velocity (Vm = 1.82 m/s), is 10,000, and the rotation numbers are 0, 0.13, 0.26, 0.39, respectively. Constant heat flux on the four channel walls are provided by Indium Tin Oxide (ITO) heater glass, the density ratio (d.r.) equaling approximately 0.1. The buoyancy number ranges from 0 to 0.153. The results showed that Coriolis force and buoyancy force have important influences on the flow field in rotating channels. Coriolis force pushes the mainstream to trailing side, making an asymmetry of the mainstream. On the cross-section, there is a symmetric two-vortex pair caused by the Coriolis. Thetwo-vortex pair is pushed into the trailing side with the increase of rotation numbers. Then, there are two small vortex appearing near the leading side. Buoyancy force suppresses mainstream and causes the separation of the flow near the leading side. When the separated flow happened, the structure of secondary flow is disordered near the leading side.

KW - Flow dynamics

KW - Heat transfer

KW - Rotating channel

KW - Secondary flow

KW - Separated flow

UR - http://www.scopus.com/inward/record.url?scp=85035011724&partnerID=8YFLogxK

U2 - 10.1016/j.ijheatmasstransfer.2017.11.073

DO - 10.1016/j.ijheatmasstransfer.2017.11.073

M3 - Article

VL - 119

SP - 236

EP - 246

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

SN - 0017-9310

ER -