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New Davanti and R&D Strategies
Published in Norbert Majerus, George Taninecz, Winning Innovation, 2022
Norbert Majerus, George Taninecz
Whereas some teams perform skits or give presentations to communicate their ideas, Ricardo’s team builds a prototype for a ski bike, which looks like a real bike, but with blades instead of wheels. And to better convey the idea, they show how a rider with short ski blades on their feet would ride it. It even included mechanisms—like snowmobile tracks or solid rocket boosters, using snow as a propellant—to get back up the hill.
High-temperature ex-vessel corium spreading. Part 1: experimental investigations on ceramic and sacrificial concrete substrates
Published in Journal of Nuclear Science and Technology, 2022
Michael Johnson, Arthur Denoix, Viviane Bouyer, Hiroshi Goda, Satoru Kamohara, Junichi Takeuchi, Laurent Brissonneau, Christophe Journeau
Depth measurements along the length of the cooled melt after the termination of spreading, presented in Figure 3(c), revealed a difference in the topology. The VE-U9-ceramic melt exhibited greater depth close to the entry to the spreading channel and a more severe curvature at the spreading front, whereas the VE-U9-concrete melt was characterised by a shallower nose and a more linear profile between the source the front. Neither melt profile clearly exhibited a distinctive overhang at the melt front, or elevated nose, consistent with some simulations of melt spreading under no-slip conditions [15]. The steeper melt profile at the spreading front on the zirconia substrate is consistent with enhanced resistance to spreading at the melt-substrate interface. The high-friction at the melt-substrate interface manifests in a significant disparity between the melt velocity at the free surface and the diminished velocity at the melt-substrate interface, which forces the melt to advance with a crawling motion (picture the motion of the tread of continuous-track vehicles, such as an armoured tank or snowmobile), resulting in a steeper profile at the front than low-friction cases characterized by a gliding motion.