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Enhanced Thermal Conductivity for Nanofluids Containing Silver Nanowires with Different Shapes

Nanofluids are the special agents to enhance the heat transfer property of the common fluids, and most of the thermal additives are the spherical nanoparticles. Up to now, the 1-D thermal additives are not well exploited. In this paper, we synthesize a kind of silver nanowires (AgNWs) with well-distributed shape and aspect ratio. The results show that when we use the AgNWs prepared by the poly-vinyl-pyrrolidone (PVP) with a specific molecular weight 40000, the thermal conductivity enhancement of nanofluids prepared by that kind of silver nanowires is as high as 13.42% when loading 0.46 vol.% AgNWs, and the value of the thermal conductivity is 0.2843 W/m.K, which is far more than the case loading the same volume of spherical silver particles. Besides, we use HC model to fit the experimental results and it occurs to be roughly consistent with each other.

This paper highlights application of the C-Therm TCi Thermal Conductivity Analyzer.

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