New apparatus is described to simulate a compliant seal interface, allowing the percolation of liquid to be viewed by a fluorescence microscope. A model, based on the boundary element (BE) methodology, is used to provide a theoretical explanation of the observed behavior. The impact of contact pressure, roughness, and surface energy on percolation rates are characterized. For hydrophilic surfaces, percolation will always occur provided a sufficient number of roughness length scales are considered. However, for hydrophobic surfaces, the inlet pressure must overcome the capillary pressure exerted at the minimum channel section before flow can occur.
The Percolation of Liquid Through a Compliant Seal—An Experimental and Theoretical Study
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received March 5, 2018; final manuscript received July 20, 2018; published online September 10, 2018. Assoc. Editor: Matevz Dular.
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Vlădescu, S., Putignano, C., Marx, N., Keppens, T., Reddyhoff, T., and Dini, D. (September 10, 2018). "The Percolation of Liquid Through a Compliant Seal—An Experimental and Theoretical Study." ASME. J. Fluids Eng. March 2019; 141(3): 031101. https://doi.org/10.1115/1.4041120
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