ENHANCED HEAT TRANSFER AND THERMAL PERFORMANCE FACTOR OF COILED WIRE INSERTED rGO/Co_3O_4 HYBRID NANOFLUID CIRCULATING IN A HORIZONTAL TUBE

Sundar Lingala Syam; Mathew Bobby; Sefelnasr AhmedSherif MohsenSharma K. V

首页> 外文期刊>Journal of enhanced heat transfer: Theory and application in high performance heat and mass transfer >ENHANCED HEAT TRANSFER AND THERMAL PERFORMANCE FACTOR OF COILED WIRE INSERTED rGO/Co_3O_4 HYBRID NANOFLUID CIRCULATING IN A HORIZONTAL TUBE

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ENHANCED HEAT TRANSFER AND THERMAL PERFORMANCE FACTOR OF COILED WIRE INSERTED rGO/Co_3O_4 HYBRID NANOFLUID CIRCULATING IN A HORIZONTAL TUBE

机译：ENHANCED HEAT TRANSFER AND THERMAL PERFORMANCE FACTOR OF COILED WIRE INSERTED rGO/Co_3O_4 HYBRID NANOFLUID CIRCULATING IN A HORIZONTAL TUBE

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The heat transfer and thermal performance factor characteristics of reduced graphene-oxide/cobalt-oxide/water hybrid nanofluid with coiled wire inserts flowing in a tube have been investigated experimentally. The focus of previous studies has been on different types of hybrid nanofluids with twisted tapes, longitudinal strips, and wire coil inserts, without much attention being paid to rGO/Co3O4 hybrid nanofluids with coiled wire inserts. The experiments performed were at various volume concentrations (0.05%-0.2%), Reynolds numbers (2000-20,000), and three coiled wire pitches (69.73, 44.46, and 19 mm). The results showed that with the dispersion of phi = 0.2% particle loading, the Nusselt number increased by 25.65%, which was further increased to 62.58% at phi = 0.2% particle loadings with 19 mm coiled wire pitch compared to water. The friction factor penalty of phi = 0.2% nanofluid in the tube was 1.11-fold, with further penalty in the friction factor of 1.42-fold for phi = 0.2% nanofluid with 19 mm coiled wire compared to water. The thermal performance factor of all of the hybrid nanofluids with the combined effect of coiled wire inserts was greater than 1, which shows that the prepared hybrid nanofluids are proper and useful fluids in a turbulent flow. Equations to determine the friction factor and Nusselt number were developed for the flow of nanofluids under turbulent conditions.

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《Journal of enhanced heat transfer: Theory and application in high performance heat and mass transfer》 |2021年第5期|77-103|共27页
作者
Sundar Lingala Syam; Mathew Bobby; Sefelnasr AhmedSherif MohsenSharma K. V;
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作者单位

Univ Aveiro, Ctr Mech Technol & Automat TEMA UA, Dept Mech Engn, P-3810193 Aveiro, Portugal;

United Arab Emirates Univ, Natl Water & Energy Ctr, Al Ain 15551, U Arab Emirates|United Arab Emirates Univ, Coll Engn, Mech Engn Dept, Al Ain 15551, U Arab Emirates;

United Arab Emirates Univ, Natl Water & Energy Ctr, Al Ain 15551, U Arab EmiratesUnited Arab Emirates Univ, Natl Water & Energy Ctr, Al Ain 15551, U Arab Emirates|United Arab Emirates Univ, Coll Engn, Civil & Environm Engn Dept, Al Ain 15551, U Arab EmiratesJawaharlal Nehru Technol Univ Hyderabad, Dept Mech Engn, Hyderabad, India;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类热力工程、热机;
关键词
heat transfer; hybrid; nanofluids; friction factor; coiled wire; thermal performance factor;

ENHANCED HEAT TRANSFER AND THERMAL PERFORMANCE FACTOR OF COILED WIRE INSERTED rGO/Co_3O_4 HYBRID NANOFLUID CIRCULATING IN A HORIZONTAL TUBE

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