Effect of Turbulence Model on Numerical Simulation of Turbulent Flow of Nanofluids in a Horizontal Pipe

Document Type : Mechanics article

Authors

1 Department of Mechanical Engineering, Qom University of Technology, Qom, Iran.

2 Department of Mechanical Engineering, Qom University of Technology, Qom, Iran

Abstract

One of the main techniques in the enhancement of heat transfer during recent decades is utilization of nanofluids. In this study, the forced convective turbulent flow of CuO-H2O and SiO2-H2O nanofluids have been numerically investigated. The results obtained for two different conditions in a horizontal tube under constant wall heat flux. In order to investigate the performance of turbulence models, various two-equation turbulence models as well as one Reynolds stress model, exist in ANSYS-FLUENT package, are used to modeling the turbulent flow. The single phase approach also, is used to estimte the thermo physical properties of the nanofluids. The Nusselt number or equivalently the heat transfer coefficient, and the friction factor are calculated in fully developed region of the flow. The experimental data are also used for the sake of comparison and to find which turbulence models has the best performance. To accomplish this, more than 500 runs have been carried out for various Reynolds number as well as different volume fractions up to 4 percent for two dimensionless number of Nusselt and friction factor.

Keywords

Main Subjects

References

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Journal of Modeling in Engineering
Volume 17, Issue 58
October 2019
Pages 279-293

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History

  • Receive Date: 04 February 2019
  • Revise Date: 27 March 2019
  • Accept Date: 04 May 2019

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