纳米级连续介质力学。研究树木浇水和恢复的工具
Continuum mechanics at nanoscale. A tool to study trees' watering and recovery
摘要：
内聚-张力理论解释了由于水分从叶片蒸发产生的负压而导致的粗汁液上升。然而，树木带来了多重挑战，并且似乎生活在非物理条件下：负压增加了空化;在连接的部分之间获得水平衡是可能的，其中一个部分处于正压，另一个部分处于负压;没有理论能够令人满意地解释栓塞事件后血管的重新填充。我们的论文在理论生物学杂志的理论形式提出了新的结果：分离压力概念的连续介质力学模型是指物理化学的Derjaguin学校。当液体体积中的压力为负，液体薄膜和蒸汽体积中的压力为正时，紧填充微管和液体薄膜中的液体行为之间的比较。在栓塞的木质部微管中，当气-汽袋压力大于气-汽体压力时，在气-汽域之间发生再填充流以清空气-汽袋，尽管液体-体压力保持为负。考虑到树的最大尺寸，该模型具有有效性限制。这些结果暗示，分离压力是一种有效的工具，研究生物液体与基板接触在纳米级范围内。
英文摘要：
The cohesion-tension theory expounds the crude sap ascent thanks to the negative pressure generated by evaporation of water from leaves. Nevertheless, trees pose multiple challenges and seem to live in unphysical conditions: the negative pressure increases cavitation; it is possible to obtain a water equilibrium between connected parts where one is at a positive pressure and the other one is at negative pressure; no theory is able to satisfactorily account for the refilling of vessels after embolism events. A theoretical form of our paper in the Journal of Theoretical Biology is proposed together with new results: a continuum mechanics model of the disjoining pressure concept refers to the Derjaguin School of physical chemistry. A comparison between liquid behaviour both in tight-filled microtubes and in liquid thin-films is offered when the pressure is negative in liquid bulks and is positive in liquid thin-films and vapour bulks. In embolized xylem microtubes, when the air-vapour pocket pressure is greater than the air-vapour bulk pressure, a refilling flow occurs between the air-vapour domains to empty the air-vapour pockets although the liquid-bulk pressure remains negative. The model has a limit of validity taking the maximal size of trees into account. These results drop inkling that the disjoining pressure is an efficient tool to study biological liquids in contact with substrates at a nanoscale range.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
