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Spacer grids with mixing vanes are generally used in fuel assemblies of Pressurized Water Reactor (PWR), which is because that mixing vanes could enhance the lateral turbulent mixing in subchannels. Thus, heat exchangements are more efficient, and the value of departure from nucleate boiling (DNB) is greatly increased. This paper presents the CFD simulation and validation of the turbulent mixing induced...
The geyser boiling in a vertical circular tube with an inner diameter of 32mm is experimentally investigated with water under system pressure, in which the heat flux and system pressures are in the ranges of 0–7.96Wcm−2 and 0.1–0.4MPa, respectively. The test channels consist of three parts: a heated channel section installed downstream, a nonheated middle channel section and an elevated water tank...
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