Numerical analysis of deterioration phenomena in heat transfer to supercritical water

1995 ◽  
Vol 38 (16) ◽  
pp. 3077-3084 ◽  
Author(s):  
S. Koshizuka ◽  
N. Takano ◽  
Y. Oka
Author(s):  
Hanyang Gu ◽  
Xu Cheng ◽  
Xiaojing Liu

Investigations on the thermal-hydraulic behavior in the SCWR fuel assembly have obtained a significant attention in the international SCWR community. However, there is still a lack of understanding and ability to predict the heat transfer behavior of supercritical fluids. In this paper, the numerical analysis is carried out to study the thermal-hydraulic behaviour in vertical sub-channels cooled by supercritical water. Remarkable differences in characteristics of secondary flow are found, especially in square lattice, between the upward flow and downward flow. The turbulence mixing across sub-channel gap for downward flow is much stronger than that for upward flow in wide lattice when the bulk temperature is lower than pseudo-critical point temperature. For downward flow, heat transfer deterioration phenomenon is suppressed with respect to the case of upward flow at the same conditions.


2016 ◽  
Vol 55 (51) ◽  
pp. 13120-13131 ◽  
Author(s):  
Samuel O. Odu ◽  
Pelle Koster ◽  
Aloijsius G. J. van der Ham ◽  
Martin A. van der Hoef ◽  
Sascha R. A. Kersten

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