Movement of Planing Surfaces on Highly Compressible Soft Porous Media

建议编号：CTS-0432229研究人员：Sheldon WEINBAUMINT：CUNY CUNY COLLEVEMENT在高度可压缩的松软多孔介质上滑行。这项拨款用于通过使平面滑行通过高度可压缩的松软多孔介质来提高平面提升表面上的润滑压力的实验和理论研究相结合的研究。利用红细胞通过紧密贴合的毛细管的运动所展示的概念，PI表明，如果固相的弹性恢复力与瞬时捕获的流体产生的升力相比较小，则滑动摩擦所产生的阻力也可以显著降低。利用这些见解，这项资助为未来一代列车探索了一种新的概念，这种列车在具有类似鹅绒的机械特性的轨道上行驶。将检查轨道顶部多孔表面和列车车厢底部的两种不同设计，以确定哪种设计提供了更好的滑动界面。实验室规模的列车轨道模型将完全用于测量在松软的多孔轨道床中形成的瞬时压力、列车车厢底部(平行面)的坡度随其速度以及移动的列车车厢上的力和加速度的函数。还建立了一个简化的理论模型来预测实验室模型及其全尺寸设计的性能特性。通过将研究和教育整合到课程中，这项研究具有产生广泛影响的特殊潜力。它已经激起了机械和生物医学工程系研究生和本科生的兴趣。国际物理学会2004年在《物理评估快报》上发表的一篇论文也被《科学》、《自然》和世界各地的近60份其他出版物报道。探索频道已经联系了私人投资者，以演示这一概念，并可能为普通公众制作一个片段。该项目和即将建设的新的实验设施也将作为高中生对科学和工程感兴趣的暑期充实计划的一部分。拟议的研究还将为优秀本科生，特别是女性和少数族裔提供机会。

PROPOSAL NO.: CTS-0432229PRINCIPAL INVESTIGATOR: SHELDON WEINBAUMINSTITUTION: CUNY CITY COLLEGEMOVEMENT OF PLANING SURFACES ON HIGHLY COMPRESSIBLE SOFT POROUS MEDIA This grant is for a combined experimental and theoretical investigation on enhancing the lubricating pressures on planar lifting surfaces by having them glide over highly compressible soft porous media. Using concepts illustrated by the motion of a red cell moving through a tightly fitting capillary, it was shown by the PI that the drag force due to sliding friction can also be dramatically reduced if the elastic restoring force of the solid phase is small compared to the lift force generated by the transiently trapped fluid.Employing these insights, this grant explores a new concept for a future generation train which rides on a track with mechanical properties akin to goose down. Two different designs for the top porous surface of the track and the underside of the train car will be examined to determine which provides a superior sliding interface. The laboratory scale train-track model will be fully instrumented to measure the transient pressures developed in the soft porous track bed, the slope of the underside of the train car (the planing surface) as a function of its velocity and the forces and accelerations on the moving train car. A simplified theoretical model is also developed to predict the performance characteristics of the laboratory model and its full scale design. The research has exceptional potential for broad impact by integrating research and education into the curriculum. It has already piqued the interest of graduate and undergraduate students in both the mechanical and biomedical engineering departments. A 2004 paper published by the PI in Physical Evaluation Letters has also been covered by Science, Nature and nearly 60 other publications world-wide. The Discovery Channel has contacted the PIs for a demonstration of the concept and may produce a segment for the general public. The program and the novel experimental facility that is to be constructed will also be used as part of a summer enrichment program for high school students interested in science and engineering. The proposed research will also provide opportunities to outstanding undergraduates, particularly women and minorities.