Heat transfer enhancement by a focused ultrasound field
A focused ultrasound field is set up in a heat transfer cavity with an elliptical cross section. A sound source and a heat source are designed at the two focus points where the sound intensity is reinforced based on the interference and standing wave criteria. The sound intensities and heat transfer...
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2020-08-01
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Online Access: | http://dx.doi.org/10.1063/1.5133083 |
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doaj-1a9697c7fda640feaf3a9f8888b1b0802020-11-25T02:58:37ZengAIP Publishing LLCAIP Advances2158-32262020-08-01108085211085211-1110.1063/1.5133083Heat transfer enhancement by a focused ultrasound fieldXiaowu Wang0Zhenping Wan1Boqian Chen2Yongling Zhao3Department of Physics, School of Science, South China University of Technology, Guangzhou 510640, ChinaSchool of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, ChinaSchool of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, ChinaDepartment of Mechanical and Process Engineering, ETH Zürich, Zürich 8093, SwitzerlandA focused ultrasound field is set up in a heat transfer cavity with an elliptical cross section. A sound source and a heat source are designed at the two focus points where the sound intensity is reinforced based on the interference and standing wave criteria. The sound intensities and heat transfer coefficients of the cavity with a focused ultrasonic field and an ordinary cavity with a rectangular cross section are measured under the natural convection heat transfer regime. The distribution of the heat transfer coefficient matches the distribution of the sound intensity. The heat transfer performance is then enhanced in the cavity with a focused ultrasonic field. The cavitations and acoustic streaming characteristics in the cavity with a focused ultrasonic field and the ordinary cavity are also studied. The velocity of acoustic streaming is larger in the cavity with a focused ultrasonic field than in the ordinary cavity, and no cavitation is observed in the ordinary cavity. Although the cavitation cloud around the heat source is unfavorable for the heat transfer in the cavity with a focused ultrasonic field, the cavitations collapse and the resulting high temperature, higher pressure, and microjet effects still contribute substantially to heat transfer.http://dx.doi.org/10.1063/1.5133083 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xiaowu Wang Zhenping Wan Boqian Chen Yongling Zhao |
spellingShingle |
Xiaowu Wang Zhenping Wan Boqian Chen Yongling Zhao Heat transfer enhancement by a focused ultrasound field AIP Advances |
author_facet |
Xiaowu Wang Zhenping Wan Boqian Chen Yongling Zhao |
author_sort |
Xiaowu Wang |
title |
Heat transfer enhancement by a focused ultrasound field |
title_short |
Heat transfer enhancement by a focused ultrasound field |
title_full |
Heat transfer enhancement by a focused ultrasound field |
title_fullStr |
Heat transfer enhancement by a focused ultrasound field |
title_full_unstemmed |
Heat transfer enhancement by a focused ultrasound field |
title_sort |
heat transfer enhancement by a focused ultrasound field |
publisher |
AIP Publishing LLC |
series |
AIP Advances |
issn |
2158-3226 |
publishDate |
2020-08-01 |
description |
A focused ultrasound field is set up in a heat transfer cavity with an elliptical cross section. A sound source and a heat source are designed at the two focus points where the sound intensity is reinforced based on the interference and standing wave criteria. The sound intensities and heat transfer coefficients of the cavity with a focused ultrasonic field and an ordinary cavity with a rectangular cross section are measured under the natural convection heat transfer regime. The distribution of the heat transfer coefficient matches the distribution of the sound intensity. The heat transfer performance is then enhanced in the cavity with a focused ultrasonic field. The cavitations and acoustic streaming characteristics in the cavity with a focused ultrasonic field and the ordinary cavity are also studied. The velocity of acoustic streaming is larger in the cavity with a focused ultrasonic field than in the ordinary cavity, and no cavitation is observed in the ordinary cavity. Although the cavitation cloud around the heat source is unfavorable for the heat transfer in the cavity with a focused ultrasonic field, the cavitations collapse and the resulting high temperature, higher pressure, and microjet effects still contribute substantially to heat transfer. |
url |
http://dx.doi.org/10.1063/1.5133083 |
work_keys_str_mv |
AT xiaowuwang heattransferenhancementbyafocusedultrasoundfield AT zhenpingwan heattransferenhancementbyafocusedultrasoundfield AT boqianchen heattransferenhancementbyafocusedultrasoundfield AT yonglingzhao heattransferenhancementbyafocusedultrasoundfield |
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