Eric Vandre Ph.D. Thesis Defense, July 17, 2013

Onset of Dynamic Wetting Failure: The Mechanics of High-speed Fluid Displacement

Eric Vandre Ph.D. Thesis Defense
Chemical Engineering and Materials Science Department
IPrime Programs: Coatings Process Fundamentals & Nanostructural Materials and Processes
July 17, 2013, University of Minnesota
Advisors: Satish Kumar (CEMS) and Marcio Carvalho (PUC-Rio)

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Abstract
Dynamic wetting involves the displacement of fluid on a solid surface by an advancing liquid. At some critical process speed wetting fails, which can be catastrophic for industrial applications. This work investigates dynamic wetting failure through novel experimental and theoretical studies. Two distinct experimental designs are studied, which collectively determine the dependence of wetting failure on system geometry and flow properties. A theoretical model is used to investigate the two-fluid displacement mechanics. Following validation against numerous experimental results, predictions from the model provide insight into the wetting-failure mechanism underlying empirical observations.