1. Nanofluids: A Review
Wednesday, 3rd March 2010

2. What are Nanofluids?
A “good” Nanofluid:
(From: Choi, 2009)

3. Historical Prologue
(From: Choi, 2009)

4. Historical Prologue
(From: Choi, 2009)

5. Historical Prologue
(From: Choi, 2009)

6. Historical Prologue
(From: Choi, 2009)

7. Are Nanofluids Really New?
Italy, 15th century….
“Nanofluid” in Luster Pottery

8. The Cooling Challenge In electronic:
scaling and processing increases, power density doubles  cooling system is needed!!

9. Size Matters in Nanofluids
Particle size matters in making nanofluids stable
Size matters in making nanofluids with novel properties

10. Making and Characterizing Nanofluids
The steps for producing nanofluids:
Two-step Process
One-step Process
Tools for characterizing nanofluids:
TEM
DLS

11. Novel Thermal Transport Phenomena
High Thermal Conductivity at Low Temperature
Nonlinear Increase in Conductivity with Nanoparticle Concentrations
Strongly Temperature-Dependent and Size Dependent

12. Volume Fraction Dependent
(From: Choi, 2009)

13. Temperature Dependent
(From: Choi, 2009)

14. Mechanisms and Models Ordered Nanolayer of Liquid Molecules
Percolation-like Behaviour
Interfacial Thermal Resistance
Brownian Motion of Nanoparticles
Nanoconvection
Surface Charge Model
Molecular-Level Mechanisms of Enhanced Conductivity

15. Mechanisms and Models Heat Transfer Model: Homogeneous Flow Dispersion
Particle Migration
Brownian Diffusion and Two Component Nonhomogeneous Equilibrium

16. Application Microelectronic cooling Engine coolant
Automatic Transmission Fluid

17. Future Direction Basic Research Applied Research Volume Production
Stability
Environmental Issues

18. Conclusion

19. Thank You