An Analytical Investigation of Free Convection Heat Transfer to Supercritical Water

1970 ◽  
Vol 92 (3) ◽  
pp. 345-350 ◽  
Author(s):  
E. S. Nowak ◽  
A. K. Konanur
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Free Convection ◽  
Supercritical Water ◽  
Thermophysical Properties ◽  
Convection Heat Transfer ◽  
Analytical Investigation ◽  
Convection Heat ◽  
Free Convection Heat ◽  
Vertical Flat Plate

Heat transfer to supercritical water (at 3400 psia in the pseudocritical region) by stable laminar free convection from an isothermal, vertical flat plate was analytically investigated. The actual variations with temperature of all or some of the thermophysical properties of supercritical water were taken into consideration. Fair agreement was found between the analytical values of this paper and existing experimental data.

scholarly journals Free convection limit to heat transfer from heatsinks with square fins on a horizontal base: Comparison with cylindrical fins

2015 ◽  
Vol 19 (5) ◽  
pp. 1565-1574
Author(s):  
S.C. Haldar ◽  
S. Manna
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Heat Flux ◽  
Free Convection ◽  
Convection Heat Transfer ◽  
Far Field ◽  
Convection Heat ◽  
Horizontal Plate ◽  
Controlling Mechanism ◽  
Free Convection Heat

Free convection about a single vertically orientated square fin on a horizontal plate has been investigated numerically. Fluid is drawn towards the fin from the far field which cools the fin and finally leaves through the top. For short fins, convection rather than the conduction is the controlling mechanism and this renders the fin thermal conductivity a parameter of little importance for such fins. Heat flux at the base of the fin decreases with increasing width of the fin confirming the benefits of large number of slender fins. A correlation has been developed to evaluate the heat flux at fin base which may be used to predict the upper bound of free convection heat transfer from any heat sink with square fins on a horizontal base. Rate of heat transfer so calculated has been compared with experimental data published recently. The study also reveals the advantage of the cylindrical fins over square fins.

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