Experimental Investigation and Visualization of Flow Boiling Heat Transfer in a Vertical Tube Containing Metal Porous Medium

Document Type : Research Article

Authors

1 Shahrood Univ.

2 Shahrood Univ

3 SUT

Abstract

In this study, flow boiling heat transfer in a vertical copper tube with internal diameter of 16 mm under constant heat flux conditions and at atmospheric pressure is experimentally investigated by using water as working fluid. All two-phase experiments are within the Slug flow regime which are visualized by a glass tube placed at the end of the laboratory bed and a high-speed camera. Heat transfer parameters such as Nusselt number and convection heat transfer coefficients are measured in different mass flow rates and heat fluxes. The results of the experiments are compared with the experimental data for the two-phase flow and the amount of deviation of the results from the proposed relationships is reported. Also, the effects of porous material, heat flux and mass flux on heat transfer parameters are investigated. It was also found that, despite the use of metal foam, the slug flow pattern remains in the porous tube.

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Main Subjects

References

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Amirkabir Journal of Mechanical Engineering
Volume 52, Issue 6
September 2020
Pages 1595-1612

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