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Viscous dissipation effect on entropy generation in curved square microchannels

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  • Guo, Jiangfeng
  • Xu, Mingtian
  • Cai, Jun
  • Huai, Xiulan

Abstract

The viscous dissipation effect on the thermodynamic performance of the curved square microchannels in laminar flow is numerically investigated. The classical Navier–Stokes equations are adopted; aniline and ethylene glycol are selected as the working fluids. The results show that the heat transfer entropy generation number and frictional entropy generation number augment relatively under viscous dissipation effect for the case of fluid heated, and the opposite results can be found for the case of fluid cooled. The heat transfer entropy generation number increases with Reynolds number at large Reynolds number region under viscous dissipation effect when ethylene glycol is heated. The total entropy generation number extremum exists for aniline, and the extremum happens earlier when aniline is heated than when aniline is cooled. The smaller the curvature radius is, the earlier the extremum appears. The extremum does not occur for ethylene glycol due to the predomination of frictional entropy generation in the total entropy generation.

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  • Guo, Jiangfeng & Xu, Mingtian & Cai, Jun & Huai, Xiulan, 2011. "Viscous dissipation effect on entropy generation in curved square microchannels," Energy, Elsevier, vol. 36(8), pages 5416-5423.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:8:p:5416-5423
    DOI: 10.1016/j.energy.2011.06.060
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    References listed on IDEAS

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    1. Naphon, Paisarn & Wongwises, Somchai, 2006. "A review of flow and heat transfer characteristics in curved tubes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 10(5), pages 463-490, October.
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    Cited by:

    1. Ibáñez, Guillermo & López, Aracely & Pantoja, Joel & Moreira, Joel & Reyes, Juan A., 2013. "Optimum slip flow based on the minimization of entropy generation in parallel plate microchannels," Energy, Elsevier, vol. 50(C), pages 143-149.
    2. Mahian, Omid & Mahmud, Shohel & Heris, Saeed Zeinali, 2012. "Analysis of entropy generation between co-rotating cylinders using nanofluids," Energy, Elsevier, vol. 44(1), pages 438-446.
    3. Huang, Pingnan & Pan, Minqiang, 2021. "Secondary heat transfer enhancement design of variable cross-section microchannels based on entransy analysis," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
    4. Guo, Jiangfeng & Huai, Xiulan, 2013. "Thermodynamic analysis of lead–bismuth eutectic turbulent flow in a straight tube," Energy, Elsevier, vol. 57(C), pages 600-606.
    5. Escandón, J. & Bautista, O. & Méndez, F., 2013. "Entropy generation in purely electroosmotic flows of non-Newtonian fluids in a microchannel," Energy, Elsevier, vol. 55(C), pages 486-496.
    6. Matin, Meisam Habibi & Khan, Waqar Ahmed, 2013. "Entropy generation analysis of heat and mass transfer in mixed electrokinetically and pressure driven flow through a slit microchannel," Energy, Elsevier, vol. 56(C), pages 207-217.
    7. Bhardwaj, Saurabh & Dalal, Amaresh & Pati, Sukumar, 2015. "Influence of wavy wall and non-uniform heating on natural convection heat transfer and entropy generation inside porous complex enclosure," Energy, Elsevier, vol. 79(C), pages 467-481.
    8. Guo, Jiangfeng & Huai, Xiulan, 2012. "Optimization design of recuperator in a chemical heat pump system based on entransy dissipation theory," Energy, Elsevier, vol. 41(1), pages 335-343.
    9. Ting, Tiew Wei & Hung, Yew Mun & Guo, Ningqun, 2014. "Entropy generation of nanofluid flow with streamwise conduction in microchannels," Energy, Elsevier, vol. 64(C), pages 979-990.

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