Thermal conductivity of CNT-water nanofluid at different temperatures, volume fractions, and diameters: experimental investigation and molecular dynamics simulations

F Jabbari and A Rajabpour and S Saedodin, MICROFLUIDICS AND NANOFLUIDICS, 25, 102 (2021).

DOI: 10.1007/s10404-021-02489-w

Experimental and atomistic studies of the heat transfer in nanostructures have recently attracted considerable attention as these two approaches can be complementary to each other. In the present study, the thermal conductivity of water-SWCNT nanofluid was investigated considering various volume concentrations and nanoparticle size at different temperatures using both experimental and molecular dynamics simulation. The effects of nanofluid temperature, nanoparticle diameter, and volume fraction (by varying the length of SWCNT) on the thermal conductivity were examined within the temperature and volume concentration ranges of 15-45 degrees C and 0.4-0.73%, respectively. The results showed an increase in the thermal conductivity of water-CNT nanofluid with incrementing the volume fraction of nanoparticles and nanofluid temperature which was more evident at higher volume fractions of nanoparticles. Furthermore, changing the carbon nanotube diameter insignificantly affected the thermal conductivity of the nanofluid.

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