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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Heat Transfer Research
Импакт фактор: 0.404 5-летний Импакт фактор: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

Выпуски:
Том 50, 2019 Том 49, 2018 Том 48, 2017 Том 47, 2016 Том 46, 2015 Том 45, 2014 Том 44, 2013 Том 43, 2012 Том 42, 2011 Том 41, 2010 Том 40, 2009 Том 39, 2008 Том 38, 2007 Том 37, 2006 Том 36, 2005 Том 35, 2004 Том 34, 2003 Том 33, 2002 Том 32, 2001 Том 31, 2000 Том 30, 1999 Том 29, 1998 Том 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2018026041
pages 799-820

FLOW AND HEAT TRANSFER IN HYDROPHOBIC MICRO PIN FINS WITH DIFFERENT CONTACT ANGLES

Ning Guan
Shandong Jiaotong University, No. 5001 Haitang Road, Changqing District, Jinan, China
G. L. Jiang
Key Laboratory for Flow and Enhanced Heat, Energy Research Institute of Shandong Academy of Sciences, 19 Keyuan Rd., Jinan 250014, China
Z. G. Liu
Key Laboratory for Flow and Enhanced Heat, Energy Research Institute of Shandong Academy of Sciences, 19 Keyuan Rd., Jinan 250014, China
C. W. Zhang
Key Laboratory for Flow and Enhanced Heat, Energy Research Institute of Shandong Academy of Sciences, 19 Keyuan Rd., Jinan 250014, China

Краткое описание

Hydrophobic micro pin fin heat sinks with contact angles θ = 99.5°, 119.5°, and 151.5° were prepared by solidifying hydrophobic layers containing nanoparticles on the surfaces immersed in flow, and the pressure drop, friction factor f, and the Nusselt number in hydrophobic micro pin fins were experimentally measured with liquid water as a working fluid. The friction factor reduction ratio df_coe and the Nu-reduction ratio dNu_coe in hydrophobic micro pin fins with different contact angles were obtained based on measurements, and the performing efficiency of heat transfer enhancement was analyzed in micro pin fins with different contact angles. The results demonstrated that the flow resistance was reduced apparently due to the hydrophobic surfaces, and the maximal value of df_coe in micro pin fins with θ = 99.5°, 119.5°, and 151.5° reached 0.52, 0.65, and 0.79, respectively. However, the Nu number in micro pin fins was also reduced due to the hydrophobic surfaces, and the reduction ratio of the Nu number became large with increase of the Re number at first and then became a constant value. Although heat exchange in micro pin fins was influenced by the hydrophobic surfaces, the comprehensive performance was improved over 100% in micro pin fins with θ = 99.5°, 119.5°, and 151.5° compared with the plain micro pin fins at a high heating load.

ЛИТЕРАТУРА

  1. Abas, A., Gianni, J., and George, S.D., Thermo-Fluid Analysis of Micro Pin-Fin Array Cooling Configurations for High Heat Fluxes with a Hot Spot, Int. J. Therm. Sci., vol. 90, pp. 290–294, 2015.

  2. Avcioglu, G.S., Ficicilar, B., Bayrakceken, A., and Eroglu, I., High Performance PEM Fuel Cell Catalyst Layers with Hydrophobic Channels, Int. J. Hydro. Energy, vol. 40, no. 24, pp. 7720–7731, 2015.

  3. Baudry, J., Chariaix, E., Tonck, A., and Mazuyer, D., Experimental Evidence for a Large Slip Effect at a Nonwetting Fluid–Solid Interface, Langmuir, vol. 17, no. 17, pp. 5232–5236, 2001.

  4. Cai, Y.H., Hu, J., Ma, H.P., Yi, B.L., and Zhang, H.M., Effects of Hydrophilic/Hydrophobic Properties on the Water Behavior in the Micro-Channels of a Proton Exchange Membrane Fuel Cell, J. Power Sources, vol. 161, no. 2, pp. 843–848, 2006.

  5. Cho, S.C. and Wang, Y., Two-Phase Flow Dynamics in a Micro Channel with Heterogeneous Surfaces, Int. J. Heat Mass Transf., vol. 71, no. 2, pp. 349–360, 2014.

  6. Choi, C., Shin, J.S., Yu, D.I., and Kim, M.H., Flow Boiling Behaviors in Hydrophilic and Hydrophobic Microchannels, Exp. Therm. Fluid Sci., vol. 35, pp. 816–824, 2011.

  7. Choi, C.H., Johan, K., Westin, A., and Breuer, K.S., Apparent Slip Flows in Hydrophilic and Hydrophobic Microchannels, Phys. Fluids, vol. 15, no. 10, pp. 2897–2902, 2003.

  8. Derby, M.M., Chatterjee, A., Peles, Y., and Jensen, M.K., Flow Condensation Heat Transfer Enhancement in a Mini-Channel with Hydrophobic and Hydrophilic Patterns, Int. J. Heat Mass Transf., vol. 68, no. 1, pp. 151–160, 2014.

  9. Fan, X.X., Zhou, Y.H., and Liu, T.Q., Analysis of Laminar Heat Transfer on Super-Hydrophobic Surface with Slip Velocity, CIESC J., vol. 61, no. 3, pp. 594–600, 2010.

  10. Guan, N., Liu, Z.G., Jiang, G.L., Zhang, C., and Ding, N., Experimental and Theoretical Investigations on the Flow Resistance Reduction and Slip Flow in Super-Hydrophobic Microtubes, Exp. Therm. Fluid Sci., vol. 69, no. 12, pp. 45–57, 2015.

  11. Guan, N., Jiang, G., Liu, Z., Zhang, C., and Ding, N., The Impact of Contact Angle on Flow Resistance Reduction in Hydrophobic Micro Pin Fins, Exp. Therm. Fluid Sci., vol. 77, no. 10, pp. 197–211, 2016.

  12. Hilpert, M., Effects of Dynamic Contact Angle on Liquid Infiltration into Inclined Capillary Tubes: (Semi)-Analytical Solutions, J. Colloid Inter. Sci., vol. 337, no. 1, pp. 138–144, 2009.

  13. Jiang, G.L., Zhang, C.W., and Guan N., Flow Characteristics of Water on Hydrophobic Micro Cylinders Group with Different Contact Angle, CIESC J., vol. 66, no. 5, pp. 1704–1709, 2015.

  14. Kandlikar, S.G., High Flux Heat Removal with Microchannels—A Roadmap of Challenges and Opportunities, Heat Transf. Eng., vol. 25, no. 8, pp. 5–14, 2005.

  15. Kosar, A., Mishra, C., and Peles, Y., Laminar Flow across a Bank of Low Aspect Ratio Micro Pin Fin, J. Fluid Eng., vol. 127, pp. 419–430, 2005.

  16. Lee, H. and Chakrabarty, K., Test Challenges for 3D Integrated Circuits, IEEE Des. Test, vol. 26, no. 5, pp. 26–35, 2009.

  17. Lenzinger, M. and Schweizer, B., Two-Phase Flow Equations with Outflow Boundary Conditions in the Hydrophobic–Hydrophilic Case, Nonlinear Analysis, vol. 73, pp. 840–853, 2010.

  18. Li, B.W., Yao, Z.H., and Hao, P.F., Incompressible LBGK Simulation of Flow Characteristics in a Micro-Channel with Patterned Superhydrophobic Surfaces, Appl. Math. Model., vol. 39, pp. 300–308, 2015.

  19. Liu, T.Y., Li, P.L., Liu, C.W., and Gau, C., Boiling Flow Characteristics in Microchannels with Very Hydrophobic Surface to Super-Hydrophilic Surface, Int. J. Heat Mass Transf., vol. 54, pp. 126–134, 2011.

  20. Lyu, S., Nguyen, D.C., Kim, D., Hwang, W., and Yoon, B., Experimental Drag Reduction Study of Super-Hydrophobic Surface with Dual-Scale Structures, Appl. Surf. Sci., vol. 286, pp. 206–211, 2013.

  21. Mastrokalos, M.E., Papadopoulos, C.I., and Kaiktsis, L., Optimal Stabilization of a Flow past a Partially Hydrophobic Circular Cylinder, Comput. Fluids, vol. 107, no. 1, pp. 256–271, 2015.

  22. McGlen, R.J., Jachuck, R., and Lin, S., Integrated Thermal Management Techniques for High Power Electronic Devices, Appl. Therm. Eng., vol. 25, pp. 1143–1156, 2004.

  23. Moffat, R.J., Describing the Uncertainties in Experimental Results, Exp. Therm. Fluid Sci., vol. 1, no. 1, pp. 3–17, 1988.

  24. Mohammad, N.N., Sekhavat, S., and Mofidi, A., Drag Reduction in a Turbulent Channel Flow with Hydrophobic Wall, J. Hydrodyn., vol. 24, no. 3, pp. 458–466, 2012.

  25. Ndao, S., Peles, Y., and Jensen, M.K., Effects of Pin Fin Shape and Configuration on the Single-Phase Heat Transfer Characteristics of Jet Impingement on Micro Pin Fins, Int. J. Heat Mass Transf., vol. 70, pp. 856–863, 2014.

  26. Ou, J. and Rothstein, J.P., Direct Velocity Measurements of the Flow past Drag-Reducing Ultrahydrophobic Surfaces, Phys. Fluids, vol. 17, pp. L1–L10, 2005.

  27. Ou, J., Blair, P., and Rothstein, J.P., Laminar Drag Reduction in Microchannels Using Ultrahydrophobic Surfaces, Phys. Fluids, vol. 16, no. 12, pp. 4635–4643, 2004.

  28. Sang, Y.C., Albadarin, A.H., Ala'a, H., Mangwandi, C., McCracken, J.N., Bell, S.E., and Walker, G.M., Properties of Super Hydrophobic Copper and Stainless Steel Meshes: Applications in Controllable Water Permeation and Organic Solvents/Water Separation, Appl. Surf. Sci., vol. 335, no. 4, pp. 107–114, 2015.

  29. Song, M., Kim, H.Y., and Kim, K., Effects of Hydrophilic/Hydrophobic Properties of Gas Flow Channels on Liquid Water Transport in a Serpentine Polymer Electrolyte Membrane Fuel Cell, Int. J. Hydro. Energy, vol. 39, no. 29, pp. 19714– 19721, 2014.

  30. Song, S.P., Yu, Z.J., Liu X.H., Qin, F., Fang, X., and Sun, X., Heat Transfer Characteristics of Water Flowing in Microchannels with Super-Hydrophobic Inner Surface, CIESC J., vol. 59, no. 10, pp. 2465–2469, 2008.

  31. Tretheway, D.C. and Carl, D.M., Apparent Fluid Slip at Hydrophobic Microchannel Walls, Phys. Fluids, vol. 14, no. 3, pp. L9–L12, 2002.

  32. Wang, B., Wang, J.D., Dou, Z.L., and Chen, D., Investigation of Retention of Gases in Transverse Hydrophobic Microgrooved Surfaces for Drag Reduction, Ocean Eng., vol. 79, pp. 58–66, 2014.

  33. Webb, R.L., Application of Rough Surfaces to Heat Exchanger Design, Int. J. Heat Mass Transf., vol. 15, pp. 1647–1658, 1972.

  34. Yin, Y., Wu, T.T., He, P., Du, Q., and Jiao, K., Numerical Simulation of Two-Phase Cross Flow in Microstructure of Gas Diffusion Layer with Variable Contact Angle, Int. J. Hydro. Energy, vol. 39, no. 28, pp. 15772–15785, 2014.

  35. Yu, D., Choi, C., and Kim, M.H., Pressure Drop and Dynamic Contact Angle of Triple-Line Motion in a Hydrophobic Microchannel, Exp. Therm. Fluid Sci., vol. 39, pp. 60–70, 2012.

  36. Zhu, Y.X. and Granick, S., Limits of the Hydrodynamic No-Slip Boundary Condition, Phys. Rev. Lett., vol. 88, no. 10, pp. 106102–106105, 2002.

  37. Zhu, X.Y., Zhu, L., Chen, H.J., Yang, M., and Zhang, W., Fabrication of Multi-Scale Micro-Lens Arrays on Hydrophobic Surfaces Using a Drop-on-Demand Droplet Generator, Optics Laser Tech., vol. 66, pp. 156–165, 2015.


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