Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 52 6 2018 12 20 Experimental Investigation and Visualization of Flow Boiling Heat Transfer in a Vertical Tube Containing Metal Porous Medium Experimental Investigation and Visualization of Flow Boiling Heat Transfer in a Vertical Tube Containing Metal Porous Medium 1595 1612 3202 10.22060/mej.2018.14539.5880 FA Mahdi Kashi Shahrood Univ. Amir Ramezani Shahrood Univ Mohsen Nazari MM Shahmardan SUT Journal Article 2018 06 01 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. 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. https://mej.aut.ac.ir/article_3202_7486cef2522ee03547cfb970a404a874.pdf