An experimental study of natural convection and wall effect in liquid metals contained in vertical cylinders
Tóm tắt
Experimental results are presented giving Nusselt Number as a function of Rayleigh Number for liquid mercury and lead when submitted to an upward temperature gradient in a cylindrical vessel. The wall effects have been evaluated by using containers with different height to diameter ratios. For values of Ra ranging from 2.104 to 2.107, Nu may be determined by the relationship: (Nu±12%)=0.078 (0.68)
L/D
Ra1/3 the region in the neighborhood of Ra=104 is characterized by a wide dispersion of data points which has been attributed to the transition from laminar to turbulent regime. The extension of these results to a wide variety of metallurgical problems is discussed.
Tài liệu tham khảo
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