This paper presents an experimental study on wave interactions with arectangular barge in a beam sea condition. Regular waves with a waveperiod the same as the natural frequency of the barge were used in the experiments due to the fact that the barge is prone to capsizing under such waves. The barge was fixed on the free surface and no waveovertopping was assumed. Particle Image Velocimetry (PIV) wasemployed to measure the full-field two-dimensional velocity. Since the flow is highly turbulent, the phase-averaging technique was used to the extract the mean flow and turbulence properties. The mean flowpattern, including velocity, vorticity, and streamline, was analyzed to quantify the mechanism of the interactions. The generation andevolution of vorticity and turbulence kinetic energy were demonstrated.The turbulent kinetic energy is found to highly correlate with the vorticity field
想象一下,未来我们穿的衣服不再仅仅是蔽体的工具,而是能够感知周围环境,监测身体状况,甚至实现人机交互的智能系统。这正是可穿戴科技的魅力所在!而将光电器件,如晶体管和光电探测器(PDs),集成到可穿戴设备和纺织品中,是实现这一愿景的关键。然而,可穿戴科技的发展面临着巨大的挑战,其中一个关键问题是如何让器件在弯曲、拉伸等机械形变下保持稳定性能。传统的器件大多依赖于硅基材料,难以满足柔性可穿戴的需求。 石墨烯-钙钛矿开启可穿戴科技新纪元为了突破这一技术瓶颈,来自剑桥大学的 Andrea C. Ferrari 教授团队在 Advanced Materials 期刊上发表了一项突破性研究,他们巧妙地将石墨烯和钙钛矿结合起来,制备出具有优异性能的可穿戴光纤光电探测器。