The effect of surfactant solutions on flow structures in turbulent Rayleigh-Benard convection

The effect of surfactant solutions on flow structures in turbulent Rayleigh-Benard convection

This paper presents an experimental study on the flow structures in turbulent Rayleigh-Bénard convection with surfactant solutions. The shadowgraph visualization was used to obtain the plumes and the velocity field was measured using particle image velocimetry. The results show that the siz...

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Main Authors: Wei Tongzhou, Cai Weihua, Huang Changye, Zhang Hongna, Su Wentao, Li Fengchen
Format: Article
Language:English
Published: VINCA Institute of Nuclear Sciences 2018-01-01
Series:Thermal Science
Subjects:
surfactant solutions
Rayleigh-Benard convection
thermal plumes
large-scale circulation
Online Access:http://www.doiserbia.nb.rs/img/doi/0354-9836/2018/0354-98361700263W.pdf
id doaj-e6480a5e1f414a4a9ba74afed92dc70b
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spelling doaj-e6480a5e1f414a4a9ba74afed92dc70b2021-01-02T05:02:04ZengVINCA Institute of Nuclear SciencesThermal Science0354-98362334-71632018-01-0122Suppl. 250751510.2298/TSCI171026263W0354-98361700263WThe effect of surfactant solutions on flow structures in turbulent Rayleigh-Benard convectionWei Tongzhou0Cai Weihua1Huang Changye2Zhang Hongna3Su Wentao4Li Fengchen5School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, ChinaSchool of Energy and Power, Shenyang Institute of Engineering, Shenyang, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, ChinaThis paper presents an experimental study on the flow structures in turbulent Rayleigh-Bénard convection with surfactant solutions. The shadowgraph visualization was used to obtain the plumes and the velocity field was measured using particle image velocimetry. The results show that the size of plumes in surfactant solution case is larger than that in Newtonian fluid case and it needs more time for surfactant solution case to start convection. The large-scale circulation fails to form in surfactant solution case and the convection velocity is smaller. A decrease of the measured Nusselt number is observed in surfactant solution case. The above phenomena are caused by the shear-shinning and elastic chara cteristics of surfactant solution.http://www.doiserbia.nb.rs/img/doi/0354-9836/2018/0354-98361700263W.pdfsurfactant solutionsRayleigh-Benard convectionthermal plumeslarge-scale circulation
collection DOAJ
language English
format Article
sources DOAJ
author Wei Tongzhou
Cai Weihua
Huang Changye
Zhang Hongna
Su Wentao
Li Fengchen
spellingShingle Wei Tongzhou
Cai Weihua
Huang Changye
Zhang Hongna
Su Wentao
Li Fengchen
The effect of surfactant solutions on flow structures in turbulent Rayleigh-Benard convection
Thermal Science
surfactant solutions
Rayleigh-Benard convection
thermal plumes
large-scale circulation
author_facet Wei Tongzhou
Cai Weihua
Huang Changye
Zhang Hongna
Su Wentao
Li Fengchen
author_sort Wei Tongzhou
title The effect of surfactant solutions on flow structures in turbulent Rayleigh-Benard convection
title_short The effect of surfactant solutions on flow structures in turbulent Rayleigh-Benard convection
title_full The effect of surfactant solutions on flow structures in turbulent Rayleigh-Benard convection
title_fullStr The effect of surfactant solutions on flow structures in turbulent Rayleigh-Benard convection
title_full_unstemmed The effect of surfactant solutions on flow structures in turbulent Rayleigh-Benard convection
title_sort effect of surfactant solutions on flow structures in turbulent rayleigh-benard convection
publisher VINCA Institute of Nuclear Sciences
series Thermal Science
issn 0354-9836
2334-7163
publishDate 2018-01-01
description This paper presents an experimental study on the flow structures in turbulent Rayleigh-Bénard convection with surfactant solutions. The shadowgraph visualization was used to obtain the plumes and the velocity field was measured using particle image velocimetry. The results show that the size of plumes in surfactant solution case is larger than that in Newtonian fluid case and it needs more time for surfactant solution case to start convection. The large-scale circulation fails to form in surfactant solution case and the convection velocity is smaller. A decrease of the measured Nusselt number is observed in surfactant solution case. The above phenomena are caused by the shear-shinning and elastic chara cteristics of surfactant solution.
topic surfactant solutions
Rayleigh-Benard convection
thermal plumes
large-scale circulation
url http://www.doiserbia.nb.rs/img/doi/0354-9836/2018/0354-98361700263W.pdf
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