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ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

NUMERICAL STUDY OF CONVECTIVE LAMINAR HEAT TRANSFER IN NANOFLUIDS

Get access (open in a dialog) DOI: 10.1615/IHTC13.p8.110
11 pages

Sinopsis

Nanofluids in recent times have developed as a prospective technology in enhancing heat transfer and thus becoming a prominent candidate among cooling fluids. Stable suspensions of nanoparticles (typically less than 100 nm) in liquids are called nanofluids. In order to implement nanofluids for thermal management of heat transfer equipments, understanding the convective heat transfer behaviour of nanofluids is of prime significance. In the present work a numerical investigation of steady state convective heat transfer in nanofluids for laminar tube flow is made. Local thermal equilibrium is assumed between the solid and liquid phase and thus nanofluid is assumed to behave as a single phase fluid with fluid thermo-physical properties modelled appropriately. Thermal conductivity of nanofluid is modelled taking into consideration the particle size, concentration, temperature, base fluid thermal conductivity, particle thermal conductivity. An additional dispersion based thermal diffusion has been introduced so as to incorporate the enhanced heat transfer seen in entrance region by matching with the experimental results of Wen and Ding (2004). Subsequently parametric study with varying particle concentration at different flow rates in the laminar range is made.