纳米流体在通道内的强化换热研究

ompared to the base fluid, nanofluids have significantly increased thermal conductivity and therefore have potential applications in many heat transfer areas. In this paper, the effects of the thermophysical properties and thermal dispersion on the convective heat transfer coefficients of nanofluids have been investigated. The analytical results show that the effective thermal conductivity of nanofluids is enhanced with the addition of nanopaticles into the base fluid. The collisions between nanoparticles, fluid molecules, and the wall of flow-wall are intensified, leading to enhanced mixing agitation and turbulence. Improved thermophysical properties and thermal dispersion result in the convective heat transfer coefficient enhancement of nanofluids. The calculation results also reveal that the effect of the heat transfer enhancement of the nanofluids is related to both the volume fractions and Reynolds number.