EXPERIMENTAL AND ANALYTICAL STUDY OF NATURAL CONVECTION HEAT TRANSFER OF INTERNALLY HEATED FLUIDS

1982 ◽  
Author(s):  
George Alanson Greene ◽  
Thomas F. Irvine, Jr. ◽  
Owen C. Jones Jr.
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Analytical Study ◽  
Convection Heat Transfer ◽  
Natural Convection Heat Transfer ◽  
Convection Heat

Natural Convection From Interrupted Vertical Walls

2014 ◽  
Vol 136 (11) ◽  
Author(s):  
Mehran Ahmadi ◽  
Golnoosh Mostafavi ◽  
Majid Bahrami
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Analytical Study ◽  
Vertical Wall ◽  
Convection Heat Transfer ◽  
Effective Length ◽  
Natural Convection Heat Transfer ◽  
Convection Heat ◽  
Vertical Walls ◽  
Compact Relationship

Steady-state external natural convection heat transfer from interrupted rectangular vertical walls is investigated. A systematic numerical, experimental, and analytical study is conducted on the effect of adding interruptions to a vertical plate. Comsol multiphysics is used to develop a two-dimensional numerical model for investigation of fin interruption effects on natural convection. A custom-designed testbed is built and six interrupted wall samples are machined from aluminum. An effective length is introduced for calculating the natural convection heat transfer from interrupted vertical walls. Performing an asymptotic analysis and using a blending technique, a new compact relationship is proposed for the Nusselt number. Our results show that adding interruptions to a vertical wall can enhance heat transfer rate up to 16% and reduce the weight of the fins, which in turn, lead to lower manufacturing and material costs.

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