کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
612227 880693 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Prediction of coupled menisci shapes by Young–Laplace equation and the resultant variability in capillary retention
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Prediction of coupled menisci shapes by Young–Laplace equation and the resultant variability in capillary retention
چکیده انگلیسی

This paper shows how 2 coupled Young–Laplace equations can be solved to predict the shapes of two coupled menisci formed in a capillary system. Experiments are performed, which demonstrate that the equilibrium volume of liquid retained in a vertical capillary, can be variable, even when all the properties of the system are invariant. This variability in liquid retention also leads to different equilibrium shapes of the top and bottom menisci. A coupled form of the Young–Laplace equation is solved to predict the two coupled menisci shapes. The curvature of the top meniscus is fitted to the experimentally recorded meniscus shape. The coupled Young–Laplace equation solution is used to predict the shape of the bottom meniscus. The shape of the bottom meniscus thus obtained, is shown to match the experimentally recorded bottom meniscus shape reasonably well. This observed coupling of the menisci has a significant impact on some porosimetric techniques which are based on liquid extrusion and explains why the volume of liquid that can be retained in a capillary can vary, under invariant conditions. Retention of liquids in capillaries is of interest in several applications like fabric wash.

This paper shows how 2 coupled Young–Laplace equations can be solved to predict the shapes of two coupled menisci formed in a capillary system. The curvature of the top meniscus is fitted to the experimentally recorded meniscus shape. The coupled Young–Laplace equation solution is used to predict the shape of the bottom meniscus. The shape of the bottom meniscus thus obtained, is shown to match the experimentally recorded bottom meniscus shape reasonably well.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 314, Issue 1, 1 October 2007, Pages 199–206
نویسندگان
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