Science China Technological Sciences

, Volume 61, Issue 2, pp 232–241 | Cite as

Experimental and numerical investigations on convective heat transfer of dual piezoelectric fans



An investigation is performed to study the convective heat transfer performance under dual piezoelectric fans. Three main aspects are involved in the current study. Firstly, vibration tests for dual specific piezoelectric fans actuating at the first-mode resonant frequency are conducted to illustrate the influence roles of vibrating phase difference and fan-to-fan pitch on the piezoelectric fan vibration amplitude. Secondly, heat transfer measurements are made to compare the heat transfer among single fan, dual fans in-phase and dual fans out-of-phase. Thirdly, three-dimensional numerical simulations are conducted to reveal the influence mechanism of dual piezoelectric fans on heat transfer. The results show that, the vibrating phase difference of dual fans has nearly no influence on the displacement velocity and amplitude of piezoelectric fan related to single fan once the dimensionless pitch (P/W) is beyond 1.2. The dual piezoelectric fans produce nearly the same peak heat transfer coefficient as that of single fan case. Of particular is that the dual fans operating in-phase produce more favorable heat transfer than the dual fans operating out-of-phase, especially in the gap zone between dual fans. Due to the interaction between dual fans, the streaming flow induced by one vibrating fan suffers the action of sweeping flow of another vibrating fan when they operate out-of-phase. While for the dual fans operating in-phase, the streaming flows induced by vibrating fans merge together to form stronger wall jet flow in the region between two fans.


piezoelectric fan dual fans convective heat transfer numerical simulation 


  1. 1.
    Yoo J H, Hong J I, Cao W. Piezoelectric ceramic bimorph coupled to thin metal plate as cooling fan for electronic devices. Sensor Actuat A-Phys, 2000, 79: 8–12CrossRefGoogle Scholar
  2. 2.
    Zhang J Z, Tan X M. Experimental study on flow and heat transfer characteristics of synthetic jet driven by piezoelectric actuator. Sci China Ser E-Tech Sci, 2007, 50: 221–229CrossRefGoogle Scholar
  3. 3.
    Gilson G M, Pickering S J, Hann D B, et al. Piezoelectric fan cooling: A novel high reliability electric machine thermal management solution. IEEE Trans Ind Electron, 2013, 60: 4841–4851CrossRefGoogle Scholar
  4. 4.
    Kim Y H, Wereley S T, Chun C H. Phase-resolved flow field produced by a vibrating cantilever plate between two endplates. Phys Fluids, 2004, 16: 145–162CrossRefMATHGoogle Scholar
  5. 5.
    Kimber M, Suzuki K, Kitsunai N, et al. Pressure and flow rate performance of piezoelectric fans. IEEE Trans Comp Packag Technol, 2009, 32: 766–775CrossRefGoogle Scholar
  6. 6.
    Kim Y H, Cierpka C, Wereley S T. Flow field around a vibrating cantilever: coherent structure eduction by continuous wavelet transform and proper orthogonal decomposition. J Fluid Mech, 2011, 669: 584–606CrossRefMATHGoogle Scholar
  7. 7.
    Choi M, Cierpka C, Kim Y H. Vortex formation by a vibrating cantilever. J Fluids Struct, 2012, 31: 67–78CrossRefGoogle Scholar
  8. 8.
    Açikalin T, Garimella S V, Raman A, et al. Characterization and optimization of the thermal performance of miniature piezoelectric fans. Int J Heat Fluid Flow, 2007, 28: 806–820CrossRefGoogle Scholar
  9. 9.
    Liu S F, Huang R T, Sheu W J, et al. Heat transfer by a piezoelectric fan on a flat surface subject to the influence of horizontal/vertical arrangement. Int J Heat Mass Transfer, 2009, 52: 2565–2570CrossRefGoogle Scholar
  10. 10.
    Kimber M, Garimella S V, Raman A. Local heat transfer coefficients induced by piezoelectrically actuated vibrating cantilevers. J Heat Transfer, 2007, 129: 1168–1176CrossRefGoogle Scholar
  11. 11.
    Abdullah M K, Abdullah M Z, Ramana M V, et al. Numerical and experimental investigations on effect of fan height on the performance of piezoelectric fan in microelectronic cooling. Int Commun Heat Mass Transfer, 2009, 36: 51–58CrossRefGoogle Scholar
  12. 12.
    Lin C N. Analysis of three-dimensional heat and fluid flow induced by piezoelectric fan. Int J Heat Mass Transfer, 2012, 55: 3043–3053CrossRefGoogle Scholar
  13. 13.
    Tan L, Zhang J Z, Tan X M. Numerical investigation of convective heat transfer on a vertical surface due to resonating cantilever beam. Int J Thermal Sci, 2014, 80: 93–107CrossRefGoogle Scholar
  14. 14.
    Fairuz Z M, Sufian S F, Abdullah M Z, et al. Effect of piezoelectric fan mode shape on the heat transfer characteristics. Int Commun Heat Mass Transfer, 2014, 52: 140–151CrossRefGoogle Scholar
  15. 15.
    Li X J, Zhang J Z, Tan X M. Investigation on heat transfer characteristics under a single piezoelectric fan (in chinese). Acta Aeronaut et Astronaut Sinica, 2017, 38: 120982Google Scholar
  16. 16.
    Kimber M, Lonergan R, Garimella S V. Experimental study of aerodynamic damping in arrays of vibrating cantilevers. J Fluids Struct, 2009, 25: 1334–1347CrossRefGoogle Scholar
  17. 17.
    Choi M, Lee S Y, Kim Y H. On the flow around a vibrating cantilever pair with different phase angles. Eur J Mech-B/Fluids, 2012, 34: 146–157CrossRefMATHGoogle Scholar
  18. 18.
    Choi M, Cierpka C, Kim Y H. Effects of the distance between a vibrating cantilever pair. Eur J Mech-B/Fluids, 2014, 43: 154–165CrossRefGoogle Scholar
  19. 19.
    Sufian S F, Abdullah M Z, Mohamed J J. Effect of synchronized piezoelectric fans on microelectronic cooling performance. Int Commun Heat Mass Transfer, 2013, 43: 81–89CrossRefGoogle Scholar
  20. 20.
    Ma S L, Chen J W, Li H Y, et al. Mechanism of enhancement of heat transfer for plate-fin heat sinks with dual piezoelectric fans. Int J Heat Mass Transfer, 2015, 90: 454–465CrossRefGoogle Scholar
  21. 21.
    Li H Y, Wu Y X. Heat transfer characteristics of pin-fin heat sinks cooled by dual piezoelectric fans. Int J Thermal Sci, 2016, 110: 26–35CrossRefGoogle Scholar
  22. 22.
    Yao Y, Zhang J Z. Investigation on film cooling characteristics from a row of converging slot-holes on flat plate. Sci China Tech Sci, 2011, 54: 1793–1800MathSciNetCrossRefGoogle Scholar
  23. 23.
    Gao S, Zhang J Z, Tan X M. Experimental study on heat transfer characteristics of synthetic jet driven by piston actuator. Sci China Tech Sci, 2012, 55: 1732–1738CrossRefGoogle Scholar
  24. 24.
    Shao W, Cui Z, Wang N H, et al. Numerical simulation of heat transfer process in cement grate cooler based on dynamic mesh technique. Sci China Tech Sci, 2016, 59: 1065–1070CrossRefGoogle Scholar
  25. 25.
    Jeong J, Hussain F. On the identification of a vortex. J Fluid Mech, 1995, 285: 69–94MathSciNetCrossRefMATHGoogle Scholar

Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.College of Energy and Power EngineeringNanjing University of Aeronautics and AstronauticsNanjingChina

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