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ABSTRACT
Cooling rate in Run Out Table (ROT) in steel industries tailors microstructure which lead to improved mechanical properties. The current work aims to increase cooling performance of steel using TiO2 nanofluid as coolant in jet impingement. Different concentrations of TiO2 nanofluid have been used to study effect on jet cooling of a steel plate from 900°C. Thermal conductivity of nanofluid is found to significantly enhance at optimum concentration and this plays major role in increasing cooling rate of the steel plate. 19% enhancement in cooling rate is observed by using 40 ppm of TiO2 nanofluid compared to water.
Nomenclature
| T1 | = | Thermocouple 1 |
| T2 | = | Thermocouple 2 |
| T3 | = | Thermocouple 3 |
| Z1 | = | Heat flux zone 1 |
| Z2 | = | Heat flux zone 2 |
| Z3 | = | Heat flux zone 3 |
| x | = | Direction along the length of the plate (mm) |
| y | = | Direction along the thickness of the plate (mm) |
Abbreviations
| TiO2 | = | Titanium dioxide |
| ROT | = | Run Out Table |
| AISI | = | American Iron and Steel Institute |
| TEM | = | Transmission electron microscopy |
| SEM | = | Scanning electron microscopy |
| EDS | = | Energy dispersive X-ray spectroscopy |
| CHF | = | Critical heat flux |
Supplementary Material
Supplemental data for this article can be accessed here.
