Analytical Solutions for Electroosmotic Flow and Heat Transfer Characteristics of Nanofluids in Circular Cylindrical Microchannels with Slip-Dependent Zeta Potential Considering Thermal Radiative Effects
This study analyzes the impact of slip-dependent zeta potential on the heat transfer characteristics of nanofluids in cylindrical microchannels with consideration of thermal radiation effects. An analytical model is developed, accounting for the coupling between surface potential and interfacial sli...
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MDPI AG
2025-01-01
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| author | Zouqing Tan Xiangcheng Ren |
| author_facet | Zouqing Tan Xiangcheng Ren |
| author_sort | Zouqing Tan |
| collection | DOAJ |
| description | This study analyzes the impact of slip-dependent zeta potential on the heat transfer characteristics of nanofluids in cylindrical microchannels with consideration of thermal radiation effects. An analytical model is developed, accounting for the coupling between surface potential and interfacial slip. The linearized Poisson–Boltzmann equation, along with the momentum and energy conservation equations, is solved analytically to obtain the electrical potential field, velocity field, temperature distribution, and Nusselt number for both slip-dependent (SD) and slip-independent (SI) zeta potentials. Subsequently, the effects of key parameters, including electric double-layer (EDL) thickness, slip length, nanoparticle volume fraction, thermal radiation parameters, and Brinkman number, on the velocity field, temperature field, and Nusselt number are discussed. The results show that the velocity is consistently higher for the SD zeta potential compared to the SI zeta potential. Meanwhile, the temperature for the SD case is higher than that for the SI case at lower Brinkman numbers, particularly for a thinner EDL. However, an inverse trend is observed at higher Brinkman numbers. Similar trends are observed for the Nusselt number under both SD and SI zeta potential conditions at different Brinkman numbers. Furthermore, for a thinner EDL, the differences in flow velocity, temperature, and Nusselt number between the SD and SI conditions are more pronounced. |
| format | Article |
| id | doaj-art-d7d0cf9c0bde487cbeedc03246203f0e |
| institution | Kabale University |
| issn | 2072-666X |
| language | English |
| publishDate | 2025-01-01 |
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| series | Micromachines |
| spelling | doaj-art-d7d0cf9c0bde487cbeedc03246203f0e2025-01-24T13:42:00ZengMDPI AGMicromachines2072-666X2025-01-011616310.3390/mi16010063Analytical Solutions for Electroosmotic Flow and Heat Transfer Characteristics of Nanofluids in Circular Cylindrical Microchannels with Slip-Dependent Zeta Potential Considering Thermal Radiative EffectsZouqing Tan0Xiangcheng Ren1School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, ChinaSchool of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, ChinaThis study analyzes the impact of slip-dependent zeta potential on the heat transfer characteristics of nanofluids in cylindrical microchannels with consideration of thermal radiation effects. An analytical model is developed, accounting for the coupling between surface potential and interfacial slip. The linearized Poisson–Boltzmann equation, along with the momentum and energy conservation equations, is solved analytically to obtain the electrical potential field, velocity field, temperature distribution, and Nusselt number for both slip-dependent (SD) and slip-independent (SI) zeta potentials. Subsequently, the effects of key parameters, including electric double-layer (EDL) thickness, slip length, nanoparticle volume fraction, thermal radiation parameters, and Brinkman number, on the velocity field, temperature field, and Nusselt number are discussed. The results show that the velocity is consistently higher for the SD zeta potential compared to the SI zeta potential. Meanwhile, the temperature for the SD case is higher than that for the SI case at lower Brinkman numbers, particularly for a thinner EDL. However, an inverse trend is observed at higher Brinkman numbers. Similar trends are observed for the Nusselt number under both SD and SI zeta potential conditions at different Brinkman numbers. Furthermore, for a thinner EDL, the differences in flow velocity, temperature, and Nusselt number between the SD and SI conditions are more pronounced.https://www.mdpi.com/2072-666X/16/1/63cylindrical microchannelsslip-dependent zeta potentialradiative heat transfernanoparticle volume fractionNusselt number |
| spellingShingle | Zouqing Tan Xiangcheng Ren Analytical Solutions for Electroosmotic Flow and Heat Transfer Characteristics of Nanofluids in Circular Cylindrical Microchannels with Slip-Dependent Zeta Potential Considering Thermal Radiative Effects Micromachines cylindrical microchannels slip-dependent zeta potential radiative heat transfer nanoparticle volume fraction Nusselt number |
| title | Analytical Solutions for Electroosmotic Flow and Heat Transfer Characteristics of Nanofluids in Circular Cylindrical Microchannels with Slip-Dependent Zeta Potential Considering Thermal Radiative Effects |
| title_full | Analytical Solutions for Electroosmotic Flow and Heat Transfer Characteristics of Nanofluids in Circular Cylindrical Microchannels with Slip-Dependent Zeta Potential Considering Thermal Radiative Effects |
| title_fullStr | Analytical Solutions for Electroosmotic Flow and Heat Transfer Characteristics of Nanofluids in Circular Cylindrical Microchannels with Slip-Dependent Zeta Potential Considering Thermal Radiative Effects |
| title_full_unstemmed | Analytical Solutions for Electroosmotic Flow and Heat Transfer Characteristics of Nanofluids in Circular Cylindrical Microchannels with Slip-Dependent Zeta Potential Considering Thermal Radiative Effects |
| title_short | Analytical Solutions for Electroosmotic Flow and Heat Transfer Characteristics of Nanofluids in Circular Cylindrical Microchannels with Slip-Dependent Zeta Potential Considering Thermal Radiative Effects |
| title_sort | analytical solutions for electroosmotic flow and heat transfer characteristics of nanofluids in circular cylindrical microchannels with slip dependent zeta potential considering thermal radiative effects |
| topic | cylindrical microchannels slip-dependent zeta potential radiative heat transfer nanoparticle volume fraction Nusselt number |
| url | https://www.mdpi.com/2072-666X/16/1/63 |
| work_keys_str_mv | AT zouqingtan analyticalsolutionsforelectroosmoticflowandheattransfercharacteristicsofnanofluidsincircularcylindricalmicrochannelswithslipdependentzetapotentialconsideringthermalradiativeeffects AT xiangchengren analyticalsolutionsforelectroosmoticflowandheattransfercharacteristicsofnanofluidsincircularcylindricalmicrochannelswithslipdependentzetapotentialconsideringthermalradiativeeffects |