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An investigation of the thermal performance of cylindrical heat pipes using nanofluids. (English) Zbl 1180.80043
Summary: In this work, a two-dimensional analysis is used to study the thermal performance of a cylindrical heat pipe utilizing nanofluids. Three of the most common nanoparticles, namely Al\(_{2}\)O\(_{3}\), CuO, and TiO\(_{2}\) are considered as the working fluid. A substantial change in the heat pipe thermal resistance, temperature distribution, and maximum capillary heat transfer of the heat pipe is observed when using a nanofluid. The nanoparticles within the liquid enhance the thermal performance of the heat pipe by reducing the thermal resistance while enhancing the maximum heat load it can carry. The existence of an optimum mass concentration for nanoparticles in maximizing the heat transfer limit is established. The effect of particle size on the thermal performance of the heat pipe is also investigated. It is found that smaller particles have a more pronounced effect on the temperature gradient along the heat pipe.

MSC:
80A20 Heat and mass transfer, heat flow (MSC2010)
76T10 Liquid-gas two-phase flows, bubbly flows
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