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NATURAL CONVECTIVE ENHANCEMENT IN A RECTANGULAR ENCLOSURE FILLED WITH NANOFLUID + | ||
| AL-TAQANI | ||
| Article 1, Volume 26, Issue 2, 2013, Pages 0-0 | ||
| Author | ||
| Selah M. Salih | ||
| Abstract | ||
| Heat convective enhancement in a two-dimensional rectangular enclosure utilizing nanofluids is investigated. The basic fluid in the enclosure is an ethylene glycol-based nanofluid containing (Cu, CuO, AL2O3 , or TiO2) nanoparticles. Calculations of heat transfer rates were performed for a range of Rayleigh number (103 ≤Ra≤106), Prandtl number is taken as (Pr = 204), and solid volume fraction (0.01 ≤ ı ≤ 0.04). The effects of Rayleigh number and solid volume fraction for different nanofluids on hydrodynamic and thermal characteristics are investigated. Results are presented in the form of streamline and isotherm plots as well as the velocity profiles and the variation of local and mean Nusselt number of rectangular enclosure utilizing nanofluids. The results indicate that the effects of solid volume fraction grow stronger on the heat transfer rates for nanoparticles. In addition, the increases of Rayleigh number leads to decrease the solid concentration effect. Also, the incremental change in the average Nusselt number is strongly depending on the nanoparticles chosen. Comparisons with previously published work on the basis of special cases are performed and found to be in excellent agreement with in maximum error (± 4 ℅). | ||
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