COMBINED CONVECTION HEAT TRANSFER OF LIQUID SODIUM IN DOWNWARD CROSSFLOW THROUGH HORIZONTAL BANKS OF TUBES

1990 ◽  
Author(s):  
Kenichiro Sugiyama ◽  
Ryoji Ishiguro ◽  
Ying Ma
Keyword(s):  
Heat Transfer ◽  
Convection Heat Transfer ◽  
Liquid Sodium ◽  
Convection Heat ◽  
Combined Convection

Combined convection heat transfer in a channel with two ribs attached to one wall

1999 ◽  
Vol 28 (5) ◽  
pp. 379-394
Author(s):  
Koji Matsubara ◽  
Kazuyoshi Nakabe ◽  
Kenjiro Suzuki ◽  
Mutsuo Kobayashi ◽  
Hiroshi Maekawa
Keyword(s):  
Heat Transfer ◽  
Convection Heat Transfer ◽  
Convection Heat ◽  
Combined Convection

scholarly journals Combined Convection Heat Transfer in a Channel with Two Ribs Attached to One Wall.

1997 ◽  
Vol 63 (614) ◽  
pp. 3362-3369
Author(s):  
Koji MATSUBARA ◽  
Kazuyoshi NAKABE ◽  
Kenjiro SUZUKI ◽  
Mutsuo KOBAYASHI ◽  
Hiroshi MAEKAWA
Keyword(s):  
Heat Transfer ◽  
Convection Heat Transfer ◽  
Convection Heat ◽  
Combined Convection

Natural Convection Heat Transfer From Vertical 5×5 Rod Bundles in Liquid Sodium

2016 ◽  
Author(s):  
Koichi Hata ◽  
Katsuya Fukuda ◽  
Tohru Mizuuchi
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Three Dimensional ◽  
Convection Heat Transfer ◽  
Heat Fluxes ◽  
Liquid Sodium ◽  
Natural Convection Heat Transfer ◽  
Convection Heat ◽  
Rod Bundles ◽  
Average Value

Natural convection heat transfer from vertical 5×5 rod bundles in liquid sodium was numerically analyzed for two types of the bundle geometry (equilateral square and triangle arrays, ESA and ETA). The unsteady laminar three dimensional basic equations for natural convection heat transfer caused by a step heat flux were numerically solved until the solution reaches a steady-state. The PHOENICS code was used for the calculation considering the temperature dependence of thermophysical properties concerned. The 5×5 test rods for diameter (D = 7.6 mm), heated length (L = 200 mm) and L/d (= 26.32) were used in this work. The surface heat fluxes for each cylinder were equally given for a modified Rayleigh number, (Rf,L)ij and (Rf,L)5×5,S/D, ranging from 3.08 × 104 to 4.19 × 107 (q = 1 × 104∼7 × 106 W/m2) in liquid temperature (TL = 673.15 K). The values of S/D, which are ratios of the diameter of flow channel for bundle geometry to the rod diameter, for vertical 5×5 rod bundles were ranged from 1.8 to 6 on each bundle geometry. The spatial distribution of local and average Nusselt numbers, (Nuav)ij and (Nuav,B)5×5,S/D, on vertical rods of a bundle was clarified. The average value of Nusselt number, (Nuav)ij and (Nuav,B)5×5,S/D, for two types of the bundle geometry with various values of S/D were calculated to examine the effect of the bundle geometry, S/D, (Rf,L)ij and (Rf,L)5×5,S/D on heat transfer. The bundle geometry for the higher (Nuav,B)5×5,S/D value under the condition of S/D = constant was examined. The correlations for (Nuav,B)5×5,S/D for two types of bundle geometry above mentioned including the effects of (Rf,L)5×5,S/D and S/D were developed. The correlations can describe the theoretical values of (Nuav,B)5×5,S/D for two types of the bundle geometry for S/D ranging from 1.8 to 6 within −11.77 to 13.34 % difference.

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