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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:45 |
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Conference: Bucharest University Faculty of Physics 2022 Meeting
Section: Physics Education
Title:
The study of capillary phenomena by means of ImageJ software
Authors:
Adriana RADU (1,2), Mihai V. POPESCU (3), Daniela STOICA (3), Cătălin BERLIC (1), Cristina MIRON (1), Valentin BARNA (1)
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Affiliation:
1) University of Bucharest, Faculty of Physics, 405 Atomistilor Street, 077125, Magurele, Romania
2) National College “Mihai-Viteazul”, 8 Independentei Avenue, Ploiesti, Romania
3) National College “Ion Luca Caragiale”, 98 Gheorghe Doja Street, Ploiesti, Romania
E-mail
cristina.miron@unibuc.ro
Keywords:
Capillary tubes, capillary ascension, ImageJ software, plugin
Abstract:
Capillary phenomena are frequently found in nature and technology, but also inside living organisms. They represent the basis for the circulation of sap in plants; they can also explain the dehydration of some bodies with capillary-porous structure and so on. The study of capillary phenomena requires precision measurements of very small diameters, contact angles, and meniscus radii of curvature. These quantities are difficult to determine by direct measurements yet can be obtained with the ImageJ software from the images recorded by a digital camera of a smartphone. The software is a free analysis program and can be downloaded from https://imagej.nih.gov/ij/. The aim of this paper is to determine the surface tension coefficient of a KMnO4 aqueous solution using Jurin law and make diameter measurements and capillary ascents on images by using ImageJ software. We also study the capillary phenomena between parallel plates and between non-parallel plates. In the case of non-parallel plates, we managed to determine the equation of liquid surface curve, with the help of a special plugin (ClickCoordinatesTooltxt) from within ImageJ. ImageJ measurements are accurate and do not require much effort or increased computer knowledge on the part of the experimenter.
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