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Numerical Study of Heat Transfer Enhancement in Microchannels

Numerical Study of Heat Transfer Enhancement in Microchannels. Jason Lam z3252911 Supervisors: Dr Victoria Timchenko A/Prof. Guan Heng Yeoh. Problem Definition. Microchannels Operating frequency increases with technological advancement Heat generation rates hamper advancement.

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Numerical Study of Heat Transfer Enhancement in Microchannels

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  1. Numerical Study of Heat Transfer Enhancement in Microchannels Jason Lam z3252911 Supervisors: Dr Victoria Timchenko A/Prof. Guan HengYeoh

  2. Problem Definition • Microchannels • Operating frequency increases with technological advancement • Heat generation rates hamper advancement

  3. Problem Definition • Microchannels • Applications • Micro-channel Heat Exchanger • Features/Limitations

  4. Features of microchannels

  5. Limitations of microchannels

  6. Features of microchannels

  7. Synthetic Jet Displacement

  8. Analysis

  9. Geometry

  10. Geometry • 2 Cavities • 4 Orifices

  11. CFX Mesh

  12. CFX Mesh

  13. Special Thermal/Mass Boundary Condition

  14. Synthetic Jet Displacement

  15. Results – Steady State Heat Transfer

  16. Results – Steady State Heat Transfer

  17. Results – Steady State Heat Transfer

  18. Results – Transient Heat Transfer

  19. Results – Heat Transfer (Comparison)

  20. Results –Heat Transfer (Comparison)

  21. Results – Fluid Flow (Comparison)

  22. Results – Fluid Flow (Comparison)

  23. Results – Fluid Flow (Comparison)

  24. Conclusions • Numerical data has been validated with the experiment with fair agreement • The synthetic jet is a feasible method for promoting mixing and enhancing heat transfer • Most appropriate method for cooling microchips.

  25. Questions?

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