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Numerical investigation of heat transfer at a rectangular channel with combined effect of nanofluids and swirling jets in a vehicle radiator

The present study is focused on the numerical investigation of heat transfer from a heated surface by using swirling jets and nanofluids. Consequences of discrete Reynolds number, inlet configuration and types of nanofluids (pure water, Al2O3-H2O, Cu- H2O, and TiO2- H2O) were studied numerically on heat transfer and fluid flow. As a base coolant Al2O3-H2O nanofluid was chosen for all parameters. So, a numerical analysis was done by using a k-ω turbulent model of PHOENICS Computational Fluid Dynamics code. It is determined that increasing Reynolds number from Re=12000 to 21000 causes an increment of 51.3% on average Nusselt Number. Using 1-jet causes an increase of 91.6% and 29.8% on average Nusselt number according to the channel flow and 2-jet. Using Cu-H2O nanofluid causes an increase of 3.6%, 7.6%, and 8.5% on the average Nusselt number with respect to TiO2- H2O, Al2O3- H2O and pure water.
PAPER REVISED: 2018-09-27
PAPER ACCEPTED: 2018-10-01
  1. R. Jadar, et al., Nanotechnology Integrated Automobile Radiator, Mater. Today Proc. 4 (2017), pp.1280-1284. DOI No. 10.1016/j.matpr.2017.09.134.
  2. K.Y. Leong, et al., Performance investigation of an automotive car radiator operated with nanofluid-based coolants (nanofluid as a coolant in a radiator), Appl. Therm. Eng. 30 (2010), pp.2685-2692. DOI No.10.1016/j.applthermaleng.2010.07.019.
  3. Kharoua, et al., The interaction of confined swirling flow with conical bluff body: numerical simulation, Chemical engineering research and design, 136 (2018), pp.207-218.
  4. Chang F., Dhir VK., Heat transfer enhancement and turbulent flow field in tangentially injected swirl flows in tubes, American Society of Mechanical Engineers, Heat Transfer Division, 256 (1993), pp.37-48.
  5. Kilic, M., et al., Experimental and numerical study of heat transfer from a heated flat plate in a rectangular channel with an impinging Jet, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 39 (2017), 1, pp. 329-344.
  6. Kilic, M., Baskaya, S., Improvement of heat transfer from high heat flux surfaces by using vortex promoters with different geometries and impinging jets, Journal of the Faculty of Engineering and Architecture of Gazi University,32 (2017), 3, pp.693-707.
  7. Teamah, M. A., et al., Numerical and experimental investigation of flow structure and behavior of nanofluids flow impingement on horizontal flat plate, Experimental Thermal and Fluid Science, 74 (2016), pp. 235-246.
  8. Sun, B., et al., Heat transfer of Single Impinging jet with Cu nanofluids, Applied Thermal Engineering, 102 (2016), pp.701-707.
  9. Kilic, M., Ali H.M., Numerical investigation of combined effect of nanofluids and multiple impinging jets on heat transfer, Thermal Science, (2018), DOI No.10.2298/TSCI171204094K.
  10. Sekrani, et al., Modelling of convective turbulent heat transfer of water-based Al2O3 nanofluids in an uniformly heated pipe, Chem. Eng. Sci., 176 (2018), pp.205-219.
  11. Wongcharee, K., et al., Heat transfer of swirling impinging jets with TiO2-water nanofluids, Chem. Eng. and Porcessing, 114 (2017), pp.16-23.
  12. Akyurek, E.F., et al., Experimental Analysis of nanofluid with wire coil turbulators in a concentric tube heat exchanger, Results in Physics, 9 (2018), pp. 376-389.
  13. Sundar, L.S., Sharma, K.V., Heat transfer enhancements of low volume concentration Al2O3 nanofluid and with longitudinal strip inserts in a circular tube, Int.J.of Heat and Mass Transfer, 53 (2010), pp. 4280-4286.
  14. Corcione, M., Empirical correlating equations for predicting the effective thermal conductivity and dynamic viscosity of nanofluids, Energy Conversation Management, 52 (2011), 1, pp.789-93.