Pool boiling surface modification by pin fin array has demonstrated a practical but effective cooling enhancement. Whilst the main challenge is to determine best configuration of dimensions and positioning, it known that result varies among working conditions. To obtain more general formulation, utterly vital deep understanding pool mechanism during phase-change process. This study aimed analyz...

In three-dimensional reaction-diffusion systems, excitation waves may form and rotate around a one-dimensional phase singularity called the filament. If the filament forms a closed curve, it will shrink over time and eventually collapse. However, filaments may pin to non-reactive objects present in the medium, reducing their rate of collapse or even allowing them to persist indefinitely. We use...

This work is focused on the expansion of Laboratory Reactor Physics and Thermal-Hydraulics (LRT) PSI multi-physics high-resolution core solver nTF/CTF to full cycle analysis for VVERs. The development code modifications depletion calculation scheme presented in detail. 1st X2 benchmark simulated by novel solver. All necessary approximations modeling options optimize computational cost are discu...

The digitally reconfigurable surface is a pin based mechanism for creating physical threedimensional contoured surfaces from a computer aided design (CAD) input. When the digital design is properly downloaded into the device, a pin array is collectively actuated to the desired geometry. A rubber interpolation layer is held onto the tops of the pins by vacuum pressure to prevent undesired dimpli...