Variational methods are used to optimize convective heat transfer in a channel gas flow. The
minimization of a functional objective combining the rate of total entropy generation in the …

Laser induced fluorescence technique (LIF) was applied to visualize and quantitatively
analyze fluid mixing in a fuel rod bundle geometry. A test facility has been designed and …

Spacer grids of fuel rod assemblies are equipped with vanes, which promote flow mixing
and turbulence within and across the sub-channels, thereby enhancing the heat transfer …

Heat transfer to supercritical water flowing upward and downward in a 2× 2 rod bundle with
wrapped wire was experimentally investigated. The rod bundle consists of four heating rods …

Experiments have been carried out to investigate the heat transfer downstream of spacer
grids in a vertical 5× 5 rod bundle cooled by single phase water. Wide ranges of mass flow …

We performed boiling flow experiments and measured the void fraction in a 3× 3 rod bundle
including a spacer grid with split type vanes using X-ray computed tomography, which …

Experimental investigations on heat transfer of supercritical water in vertical annular channel
equipped with spacers have been carried out at the SWAMUP-II facility in Shanghai Jiao …

For a large break loss-of-coolant accident (LB LOCA) in a pressurized water reactor, the clad
temperature increases until the reflood phase. This causes ballooned fuel rods and fuel …

The temperature field within a model of a sodium-cooled fast reactor fuel rod bundle was
measured using Ø155 μm fiber optic distributed temperature sensors (DTS). The bundle …

Experimental and numerical investigations on spacer-induced heat transfer deterioration of
supercritical water in annular channel have been carried out. The test section consists of a …