Experimental Investigation of Enhancement of Natural Convective Heat Transfer in Air Using Ultrasound
One of the methods to improve convective heat exchange is the application of ultrasound assistance. However, little is known about ultrasound application in the air. The main purpose of this study is to investigate the effect of ultrasound on natural convection cooling. The tests are based on the co...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/4/2516 |
| _version_ | 1797622581706096640 |
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| author | Grzegorz Musielak Dominik Mierzwa Joanna Łechtańska |
| author_facet | Grzegorz Musielak Dominik Mierzwa Joanna Łechtańska |
| author_sort | Grzegorz Musielak |
| collection | DOAJ |
| description | One of the methods to improve convective heat exchange is the application of ultrasound assistance. However, little is known about ultrasound application in the air. The main purpose of this study is to investigate the effect of ultrasound on natural convection cooling. The tests are based on the cooling of the metal samples (in four different shapes) preheated to a temperature of 60 °C. Cooling takes place in free convection without and with the use of ultrasound at different powers (50 W, 100 W, 150 W, and 200 W). The study uses a mathematical model based on a small Biot’s number assumption. The values of the convective heat exchange coefficients are determined by using an approximation of the experimental results. The coefficients obtained are an increasing exponential function of the applied ultrasound power. This study indicates the possibility of using ultrasound to improve heat transfer by free convection. |
| first_indexed | 2024-03-11T09:12:20Z |
| format | Article |
| id | doaj.art-babc10ccbeb3482abee2436c7d9860b6 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T09:12:20Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-babc10ccbeb3482abee2436c7d9860b62023-11-16T18:56:54ZengMDPI AGApplied Sciences2076-34172023-02-01134251610.3390/app13042516Experimental Investigation of Enhancement of Natural Convective Heat Transfer in Air Using UltrasoundGrzegorz Musielak0Dominik Mierzwa1Joanna Łechtańska2Institute of Technology and Chemical Engineering, Poznań University of Technology, 60-965 Poznań, PolandInstitute of Technology and Chemical Engineering, Poznań University of Technology, 60-965 Poznań, PolandInstitute of Technology and Chemical Engineering, Poznań University of Technology, 60-965 Poznań, PolandOne of the methods to improve convective heat exchange is the application of ultrasound assistance. However, little is known about ultrasound application in the air. The main purpose of this study is to investigate the effect of ultrasound on natural convection cooling. The tests are based on the cooling of the metal samples (in four different shapes) preheated to a temperature of 60 °C. Cooling takes place in free convection without and with the use of ultrasound at different powers (50 W, 100 W, 150 W, and 200 W). The study uses a mathematical model based on a small Biot’s number assumption. The values of the convective heat exchange coefficients are determined by using an approximation of the experimental results. The coefficients obtained are an increasing exponential function of the applied ultrasound power. This study indicates the possibility of using ultrasound to improve heat transfer by free convection.https://www.mdpi.com/2076-3417/13/4/2516natural convection enhancementairborne ultrasoundcoolingsmall Biot’s number conditions |
| spellingShingle | Grzegorz Musielak Dominik Mierzwa Joanna Łechtańska Experimental Investigation of Enhancement of Natural Convective Heat Transfer in Air Using Ultrasound Applied Sciences natural convection enhancement airborne ultrasound cooling small Biot’s number conditions |
| title | Experimental Investigation of Enhancement of Natural Convective Heat Transfer in Air Using Ultrasound |
| title_full | Experimental Investigation of Enhancement of Natural Convective Heat Transfer in Air Using Ultrasound |
| title_fullStr | Experimental Investigation of Enhancement of Natural Convective Heat Transfer in Air Using Ultrasound |
| title_full_unstemmed | Experimental Investigation of Enhancement of Natural Convective Heat Transfer in Air Using Ultrasound |
| title_short | Experimental Investigation of Enhancement of Natural Convective Heat Transfer in Air Using Ultrasound |
| title_sort | experimental investigation of enhancement of natural convective heat transfer in air using ultrasound |
| topic | natural convection enhancement airborne ultrasound cooling small Biot’s number conditions |
| url | https://www.mdpi.com/2076-3417/13/4/2516 |
| work_keys_str_mv | AT grzegorzmusielak experimentalinvestigationofenhancementofnaturalconvectiveheattransferinairusingultrasound AT dominikmierzwa experimentalinvestigationofenhancementofnaturalconvectiveheattransferinairusingultrasound AT joannałechtanska experimentalinvestigationofenhancementofnaturalconvectiveheattransferinairusingultrasound |