Numerical analysis of fluid flow and combined natural and force convection heat transfer for nanofluid in concentric /eccentric rotating cylinders

Authors

1 Faculty of Engineering, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran

2 Department of Mechanical Engineering, engineering faculty, Vali-e-Asr university, Rafsanjan, Iran

3 mechanics, faculty of engineering, vali-e-asr university of rafsanajn

10.22044/jsfm.2023.12643.3689

Abstract

In the present study, fluid flow and combined natural and force convection heat transfer of a nanofluid in the horizontal concentric / eccentric cylindrical with different uniform wall temperatures is numerically investigated. The force flow is induced by the cold rotating outer cylinder at slow constant angular velocity, with its axis at the center of the annulus. Moreover, in calculating the buoyancy force caused by temperature difference between annulus, used of the Boussinesq approximation. the results are presented for non-dimensional group number (Reynolds and Rayleigh (.An increase in the Rayleigh number causes non-uniformity of the flow and isothermal lines and increases the heat transfer in the walls. The highest heat transfer related to the two-phase state of non-concentric cylinders was obtained. An increase in the Rayleigh number causes non-uniformity of the flow and isothermal lines and increases the heat transfer in the walls. The highest heat transfer related to the two-phase state of non-concentric cylinders was obtained.

Keywords

Main Subjects

References

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Journal of Solid and Fluid Mechanics
Volume 13, Issue 5
November and December 2023
Pages 77-89

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