The Effect of Streaming Potential and Viscous Dissipation in the Heat Transfer Characteristics of Power-Law Nanofluid Flow in a Rectangular Microchannel
The non-Newtonian nanofluid flow becomes increasingly important in enhancing the thermal management efficiency of microscale devices and in promoting the exploration of the thermal-electric energy conversion process. The effect of streaming potential and viscous dissipation in the heat transfer char...
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MDPI AG
2020-04-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/11/4/421 |
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| author | Shuyan Deng Quan An Mingying Li |
| author_facet | Shuyan Deng Quan An Mingying Li |
| author_sort | Shuyan Deng |
| collection | DOAJ |
| description | The non-Newtonian nanofluid flow becomes increasingly important in enhancing the thermal management efficiency of microscale devices and in promoting the exploration of the thermal-electric energy conversion process. The effect of streaming potential and viscous dissipation in the heat transfer characteristics of power-law nanofluid electrokinetic flow in a rectangular microchannel has been investigated to assist in the development of an energy harvesting system. The electroviscous effect caused by the streaming potential influences the hydrodynamical and thermal characteristics of flow. With the change in constitutive behavior of power-law nanofluid, the viscous dissipation effect is considered. The Poisson–Boltzmann equation, the modified Cauchy momentum equation, and the energy equation were solved. The temperature and heat transfer rate were analytically expressed for Newtonian nanofluid and numerically obtained for power-law nanofluid. The interactive influence of streaming potential, viscous dissipation, and hydrodynamical features of power-law nanofluid on the heat transfer characteristics were studied. The presence of streaming potential tends to reduce the dimensionless bulk mean temperature. The introduction of nanoparticles augments dimensionless temperature difference between channel wall and bulk flow, which decreases the heat transfer rate. The shear thinning nanofluid is more sensitive to the above effects. The temperature is a weak function of the flow behavior index. |
| first_indexed | 2024-03-10T20:24:07Z |
| format | Article |
| id | doaj.art-4f5f8958e55a445abc3731f2d71a8e3d |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T20:24:07Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-4f5f8958e55a445abc3731f2d71a8e3d2023-11-19T21:57:47ZengMDPI AGMicromachines2072-666X2020-04-0111442110.3390/mi11040421The Effect of Streaming Potential and Viscous Dissipation in the Heat Transfer Characteristics of Power-Law Nanofluid Flow in a Rectangular MicrochannelShuyan Deng0Quan An1Mingying Li2Institute of Architecture and Civil Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, ChinaEarthquake Administration of Inner Mongolia Autonomous Region, Hohhot 010021, ChinaInstitute of Architecture and Civil Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, ChinaThe non-Newtonian nanofluid flow becomes increasingly important in enhancing the thermal management efficiency of microscale devices and in promoting the exploration of the thermal-electric energy conversion process. The effect of streaming potential and viscous dissipation in the heat transfer characteristics of power-law nanofluid electrokinetic flow in a rectangular microchannel has been investigated to assist in the development of an energy harvesting system. The electroviscous effect caused by the streaming potential influences the hydrodynamical and thermal characteristics of flow. With the change in constitutive behavior of power-law nanofluid, the viscous dissipation effect is considered. The Poisson–Boltzmann equation, the modified Cauchy momentum equation, and the energy equation were solved. The temperature and heat transfer rate were analytically expressed for Newtonian nanofluid and numerically obtained for power-law nanofluid. The interactive influence of streaming potential, viscous dissipation, and hydrodynamical features of power-law nanofluid on the heat transfer characteristics were studied. The presence of streaming potential tends to reduce the dimensionless bulk mean temperature. The introduction of nanoparticles augments dimensionless temperature difference between channel wall and bulk flow, which decreases the heat transfer rate. The shear thinning nanofluid is more sensitive to the above effects. The temperature is a weak function of the flow behavior index.https://www.mdpi.com/2072-666X/11/4/421power-law nanofluidheat transferstreaming potentialelectrokinetic flowNusselt number |
| spellingShingle | Shuyan Deng Quan An Mingying Li The Effect of Streaming Potential and Viscous Dissipation in the Heat Transfer Characteristics of Power-Law Nanofluid Flow in a Rectangular Microchannel Micromachines power-law nanofluid heat transfer streaming potential electrokinetic flow Nusselt number |
| title | The Effect of Streaming Potential and Viscous Dissipation in the Heat Transfer Characteristics of Power-Law Nanofluid Flow in a Rectangular Microchannel |
| title_full | The Effect of Streaming Potential and Viscous Dissipation in the Heat Transfer Characteristics of Power-Law Nanofluid Flow in a Rectangular Microchannel |
| title_fullStr | The Effect of Streaming Potential and Viscous Dissipation in the Heat Transfer Characteristics of Power-Law Nanofluid Flow in a Rectangular Microchannel |
| title_full_unstemmed | The Effect of Streaming Potential and Viscous Dissipation in the Heat Transfer Characteristics of Power-Law Nanofluid Flow in a Rectangular Microchannel |
| title_short | The Effect of Streaming Potential and Viscous Dissipation in the Heat Transfer Characteristics of Power-Law Nanofluid Flow in a Rectangular Microchannel |
| title_sort | effect of streaming potential and viscous dissipation in the heat transfer characteristics of power law nanofluid flow in a rectangular microchannel |
| topic | power-law nanofluid heat transfer streaming potential electrokinetic flow Nusselt number |
| url | https://www.mdpi.com/2072-666X/11/4/421 |
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