Cocurrent turbulent mixed convection heat and mass transfer in falling film of water inside a vertical heated tube

✍ Scribed by M Feddaoui; A Mir; E Belahmidi

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 473 KB
• Volume: 46
• Category: Article
• ISSN: 0017-9310
• DOI: 10.1016/s0017-9310(03)00129-7

✦ Synopsis

A detailed numerical study has been conducted in order to analyse the combined buoyancy effects of thermal and mass diffusion on the turbulent mixed convection tube flows. Numerical results for air-water system are presented under different conditions. A low Reynolds number k-e turbulent model is used with combined heat and mass transfer analysis in a vertical heated tube. The local heat fluxes, Nusselt and Sherwood numbers are reported to obtain an understanding of the physical phenomena. Predicted results show that a better heat transfer results for a higher gas flow Reynolds number Re, a higher heat flux q w or a lower inlet water flow C 0 . Additionally, the results indicate that the convection of heat by the flowing water film becomes the main mechanism for heat removal from the wall.