Two-phase numerical model for thermal conductivity and convective heat transfer in nanofluids |
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Authors: | Sasidhar Kondaraju Joon Sang Lee |
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Affiliation: | (1) Department of Mechanical Engineering, Yonsei University, Seoul, Korea |
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Abstract: | Due to the numerous applications of nanofluids, investigating and understanding of thermophysical properties of nanofluids
has currently become one of the core issues. Although numerous theoretical and numerical models have been developed by previous
researchers to understand the mechanism of enhanced heat transfer in nanofluids; to the best of our knowledge these models
were limited to the study of either thermal conductivity or convective heat transfer of nanofluids. We have developed a numerical
model which can estimate the enhancement in both the thermal conductivity and convective heat transfer in nanofluids. It also
aids in understanding the mechanism of heat transfer enhancement. The study reveals that the nanoparticle dispersion in fluid
medium and nanoparticle heat transport phenomenon are equally important in enhancement of thermal conductivity. However, the
enhancement in convective heat transfer was caused mainly due to the nanoparticle heat transport mechanism. Ability of this
model to be able to understand the mechanism of convective heat transfer enhancement distinguishes the model from rest of
the available numerical models. |
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