Heat transfer and fluid flow of nanofluids in laminar radial flow cooling systems
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Nanofluids are considered as interesting alternatives to conventional coolants. It is well known that traditional fluids have limited heat transfer capabilities when compared to common metals. It is therefore quite conceivable that a small amount of extremely fine metallic particles placed in suspension in traditional fluids will considerably increase their heat transfer performances. A numerical investigation into the heat transfer enhancement capabilities of coolants with suspended metallic nanoparticles inside a radial, laminar flow cooling configuration is presented. Temperature dependant nanofluid properties are evaluated from experimental data available in recent literature. Results indicate that considerable heat transfer increases are possible with the use of relatively small volume fractions of nanoparticles. Generally, however, these are accompanied by considerable increases in wall shear-stress. Results also show that predictions obtained with temperature variable nanofluid properties yield greater heat transfer capabilities and lower wall shear stresses when compared to predictions using constant properties.
Keywordsnanofluids nanoparticles heat transfer laminar flow confined radial flow
CLC numberTK 124
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- Masuda, H, Ebata, A, Teramae, K, et al. Alteration of Thermal Conductivity and Viscosity of Lquid by Dispersing Ultra-fine Particles (Dispersion of γ-Al2O3, SiO2 and TiO2 Ultra-fine Particles) (in Japanese). Netsu Bussei, 1993, 4(4): 227–233Google Scholar
- Maïga, S E B, Palm, S J, Nguyen, C T, et al. Heat Transfer Enhancement by Using Nanofluids in Forced Convection Flows. Int. Journal of Heat and Fluid Flow, 2005Google Scholar
- Downs, S J, James, E H. Jet Impingement Heat Transfer-A Literature Survey. ASME 87-HT-35, 1987, 1–11Google Scholar
- Garimella, S V, Rice, R A. Confined and Submerged Liquid Jet Impingement Heat Transfer. J. of Heat Transfer, 1995, 117: 871–877Google Scholar
- Warsi, Z U A. Fluid Dynamics Theoretical and Computational Approach. 2nd Ed., CRC Press: Boca Raton, Florida, USA, 1999Google Scholar
- Palm, S J. Étude numérique de l’écoulement et du transfert thermique entre deux disques coaxiaux stationnaires en présence d’un nanofluide: [M.Sc.A. thesis]. France: Université de Moncton, 2005.Google Scholar