1. Jason Lam z3252911 Supervisors: Dr Victoria Timchenko A/Prof. Guan Heng Yeoh

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

4. Parameter Shell and tube heat exchanger Compact heat exchanger Micro-channel heat exchanger Surface area per unit volume (m 2 · m -3 ) 50 – 100850 – 1000>1500 Heat transfer coefficient (liquid) (Wm-2K-1) ~ 5000 (tube side) 3000 – 7000>7000 Heat transfer coefficient (gas) (Wm-2K-1) 20 – 10050 – 300400 – 2000 Approach Temperature (°C)~ 20°C~ 10°C<10°C

5. Parameter Shell and tube heat exchanger Compact heat exchanger Micro-channel heat exchanger Flow Regime

8. Numerical Experimental InstitutionUniversity of New South Wales The Institute of Thermomechanics ASCR PersonJason Lam Zdeněk Trávníček Transport phenomena Heat Transfer (Temperature)Mass Transfer (Concentration)

10. 2 Cavities 4 Orifices

13. Numerical Experimental SourceT s = 25°CNaphthalene Sample LocationPartially applied at the bottom of the channel

26. 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.