自催化化学烟圈
Autocatalytic chemical smoke rings
摘要：
浮力羽流，发展自由的边界限制，可能会发展明确的蘑菇形头部。在正常的羽流中，当头部上升时，头部中的翻转流从周围环境中夹带较少的浮力流体，从而使羽流失去其驱动力。我们在这里考虑一种新型的羽流，其中浮力的来源是一种自催化化学反应。反应发生在一个尖锐的前沿，将反应物与密度较低的产物分开。在这种类型的羽流中，夹带有助于反应，产生新的浮力，为加速的羽流头提供燃料。当头部已经增长到一个临界尺寸时，它从上涌管道中分离出来，形成一个加速的浮力涡环。这个漩涡类似于上升的烟圈。第二代头部在分离点处形成。多代化学涡旋环可以从一次触发事件中分离出来。
英文摘要：
Buoyant plumes, evolving free of boundary constraints, may develop well-defined mushroom shaped heads. In normal plumes, overturning flow in the head entrains less buoyant fluid from the surroundings as the head rises, robbing the plume of its driving force. We consider here a new type of plume in which the source of buoyancy is an autocatalytic chemical reaction. The reaction occurs at a sharp front which separates reactants from less dense products. In this type of plume, entrainment assists the reaction, producing new buoyancy which fuels an accelerating plume head. When the head has grown to a critical size, it detaches from the upwelling conduit, forming an accelerating, buoyant vortex ring. This vortex is analogous to a rising smoke ring. A second-generation head then develops at the point of detachment.Multiple generations of chemical vortex rings can detach from a single triggering event.
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。
