کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
592484 | 1453905 | 2015 | 8 صفحه PDF | دانلود رایگان |
• Complete characterization of a 2D foam from optical images.
• Surface Evolver allows for the accurate reconstruction of bubble pressures.
• A measurement of the work done to the foam enables to characterize its structure completely.
Static 2D foams have the interesting property that their energy is measurable by summing up the length of their films, so that a simple optical picture of a 2D foam should enable measurement of its energy and other quantities such as its bubbles’ pressures. This operation is of course unrealizable in most experiments since the optical resolution limits the accuracy of length measurements. Here we show that, using image analysis tools alongside an iterative procedure based on the Surface Evolver (Brakke, 1992) to analyze optical images of a 2D foam, we are able to measure accurately its energy and its bubbles’ pressures up to a single multiplying factor. We determine this factor, and validate this procedure, by comparing experimental measurements of the pressure and the work done on a 2D foam experiencing a quasi-static localized deformation with the energy and pressures computed using our procedure.
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Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 468, 5 March 2015, Pages 193–200