Research Initiation Award: Study of Maragoni Driven Fingering Instability

小组讨论摘要 提案编号：CTS-9409579 P.I.： 桑德拉·M Trioan机构：普林斯顿大学 Troian博士提出了一个理论和实验研究的新的指状不稳定性的Marangoni型的液滴在薄膜上的表面张力较高的蔓延。 强调表面活性剂溶液的临界胶束浓度附近，理论将减少膜抑郁症的基础上的径向扩展液滴和垂直扩散运输的可溶性表面活性剂，液滴作为一个水库。 试图通过分析竞争的稳定性和不稳定的影响，以确定占主导地位。 实验流动可视化是基于图像处理。 保利强烈支持识别和有见地的分析重要的新要素的问题，有老的根源。 优秀的工作由PI与优秀的背景。 潜在的应用动机很好;但其中一些与工程有点脱节，或者不清楚相关的Marangoni不稳定性是否占主导地位或主要影响（例如，液滴吸入-非常复杂）。 写得很好的提案涵盖了有见地的渐近理论和实验。 有些人担心，理论的适当合作者是博士后水平，而不是研究生博士学位。教育-作为一般性意见提出。 但是，该地区绝对是培养化学工程师在非常健全的基础知识成熟。 总体而言，令人印象深刻的物理学。

SUMMARY OF PANEL DISCUSSION Proposal Number: CTS-9409579 P.I.: Saundra M. Trioan Institution: Princeton University Dr. Troian proposes a theoretical and experimental investigation of novel fingering instabilities in Marangoni-type spreading of liquid drops on thin films of higher surface tension. Emphasizing surfactant solutions near the critical micel concentration, theory will reduce the film depression at the base of radially spreading drops and vertical diffusive transport of soluble surfactants, with the drop acting as a reservoir. Seeks to determine the dominant through analysis of competition of stabilities and destabilizing effects. Experimental flow visualization is based on image processing. Pauley strongly supports identification and insightful analysis of important new elements of a problem that has old origins. Excellent work by PI with excellent background. Potential applications well motivated; but some of them a bit removed from engineering, or else it is not clear that the pertinent Marangoni instability is dominant or major effect (e.g., droplet inhalation- very complex). well written proposal covers insightful asymptotic theory and experiments. Some concern that appropriate collaborator for theory is at post doctoral level, and not in realm of graduate {SYMBOL 222 \f "Symbol"} Ph.D. education - made as a general comment. But area is definitely ripe for training chemical engineers in very sound fundamentals. Overall, impressive physics.