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Bhattad A, Rao BN, Atgur V, Banapurmath NR, Sajjan AM, Vadlamudi C, Krishnappa S, Yunus Khan TM, Ayachit NH. Studies on Evaluation of the Thermal Conductivity of Alumina Titania Hybrid Suspension Nanofluids for Enhanced Heat Transfer Applications. ACS OMEGA 2023; 8:24176-24184. [PMID: 37457476 PMCID: PMC10339332 DOI: 10.1021/acsomega.2c07513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 06/14/2023] [Indexed: 07/18/2023]
Abstract
Extensive investigations were made and empirical relations were proposed for the thermal conductivity of mono-nanofluids. The effect of concentration, diameter, and thermal properties of participating nanoparticles is missing in the majority of existing thermal conductivity models. An attempt is made to propose a model that considers the influence of such missing parameters on the thermal conductivity of hybrid nanofluids. Al2O3-TiO2 hybrid nanofluids have a 0.1% particle volume concentration prepared with distinct particle volume ratios (k - 1:6 - k, k = 1 to 6) in DI water. The samples were characterized, and the size and shape of the nanoparticles were verified. Also, the influence of varying particle volume ratios and the fluid temperature (varying from 283 to 308 K) were examined. 2.4 and 2.1% enhancements were observed in the thermal conductivity of alumina (5:0) and titania (0:5) nanofluids (having 0.1% volume concentration), respectively. Due to the low thermal conductivity of titania nanoparticles, the conductivity of the hybrid solution is above that of titania and below that of alumina nanofluids. An empirical relation for the thermal conductivity of hybrid nanofluids is established and validated considering the individual particle size, volume ratio, and thermal conductivity of particles.
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Affiliation(s)
- Atul Bhattad
- Department
of Mechanical Engineering, Koneru Lakshmaiah
Education Foundation, Green Fields, Vaddeswaram, Guntur 522502, India
| | - B. Nageswara Rao
- Department
of Mechanical Engineering, Koneru Lakshmaiah
Education Foundation, Green Fields, Vaddeswaram, Guntur 522502, India
| | - Vinay Atgur
- Department
of Mechanical Engineering, Koneru Lakshmaiah
Education Foundation, Green Fields, Vaddeswaram, Guntur 522502, India
| | - Nagaraj R. Banapurmath
- Department
of Mechanical Engineering, KLE Technological
University, Hubballi 580031, India
- Centre
of Excellence in Material Science, KLE Technological
University, Hubballi 580031, India
| | - Ashok M. Sajjan
- Centre
of Excellence in Material Science, KLE Technological
University, Hubballi 580031, India
- Department
of Chemistry, KLE Technological University, Hubballi 580031, India
| | - Chandramouli Vadlamudi
- Aerospace
Integration Engineer, Aerosapien Technologies, Daytona Beach, Florida 32114, United States
| | - Sanjay Krishnappa
- Aerospace
Integration Engineer, Aerosapien Technologies, Daytona Beach, Florida 32114, United States
| | - T. M. Yunus Khan
- Department
of Mechanical Engineering, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia
| | - Narasimha H. Ayachit
- Centre
of Excellence in Material Science, KLE Technological
University, Hubballi 580031, India
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Jafari K, Fatemi MH, Lugo L. Influence of MgO concentration and water content on thermal conductivity enhancement of nanofluids based on deep eutectic solvent (choline chloride:glycerol). J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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