“…In the course of repeating our earlier experiments to free up soap films from a rectangular wire frame (Mayer & Krechetnikov 2010 a , b , 2017), we encountered the phenomena shown in figure 2, where two outcome patterns can be distinguished: ( a ) fold and ( b ) no-fold. While the fold may appear as a standing SW, it proves to be not so.…”
Section: Methodsmentioning
confidence: 86%
“…The main components of the experimental set-up shown schematically in figure 1 include the wire frame, its withdrawal mechanism for creating the soap film (not shown), film thickness measurement system, film release electrical circuit by Joule heating (Mayer & Krechetnikov 2017) and high-speed visualization. Figure 1.The experimental apparatus.…”
Section: Experimental Apparatus and Proceduresmentioning
confidence: 99%
“…SDS was chosen for several reasons, one being that it is well characterized and has been used in a number of fluid interface studies (Mysels & Cox 1962; Lyklema, Scholten & Mysels 1965; McEntee & Mysels 1969; Evers, Shulepov & Frens 1996; Huibers & Shah 1997; Berg, Adelizzi & Troian 2005). While the primary use of glycerol is to stabilize the soap film (Mayer & Krechetnikov 2017) and control its thickness, the addition of glycerol may also lead to extraneous ramifications, such as affecting the characteristic time of settling the edge retraction velocity (Savva & Bush 2009) and the kinetics of SDS (Khan et al. 2019).…”
Section: Experimental Apparatus and Proceduresmentioning
confidence: 99%
“…Once the soap film is positioned horizontally, after two steps take place in parallel (the delay is to let the soap film stabilize in the horizontal orientation and relax possible motions in the film caused during the rotation step). First, the soap film is released by impulsive Joule heating of the frame wire (Mayer & Krechetnikov 2017). The energy required for the impulsive heating is stored in a capacitor (C) and delivered to the wire through a thyristor (SCR) in a single high-voltage 2.4 kV electrical pulse.…”
Section: Experimental Apparatus and Proceduresmentioning
confidence: 99%
“…Measurements of the soap film thickness were performed with the help of a collimated broadband light source (Dolan Jenner MI-150) as a light emitter, and a collimating lens/fibre optic cable (Thorlabs M25L02) as a collector of the light transmitted through the soap film, which in turn sends an optical signal to an ultraviolet–visible (UV-VIS) spectrometer (Ocean Optics USB4000-UV-VIS). A detailed explanation of the soap film thickness measurement can be found in Mayer & Krechetnikov (2017). For each test condition, the measurement was repeated three times and the average value reported, with the maximum deviation being in all cases.…”
Section: Experimental Apparatus and Proceduresmentioning
Earlier systematic experimental studies of bursting soap films by McEntee & Mysels (J. Phys. Chem., vol. 73, 1969, pp. 3018–3028) revealed the existence of a precursor shock wave preceding the expanding hole in a punctured film, with a disturbed region of shrinking film material in between known as the ‘aureole’. In the present work we report and interpret new phenomena associated with the aureole – the formation of folds on the surface of soap films. In search of the theoretical explanation of the experimentally identified conditions under which the folds appear, we establish that they correspond to catastrophes of collapsing soap films.
“…In the course of repeating our earlier experiments to free up soap films from a rectangular wire frame (Mayer & Krechetnikov 2010 a , b , 2017), we encountered the phenomena shown in figure 2, where two outcome patterns can be distinguished: ( a ) fold and ( b ) no-fold. While the fold may appear as a standing SW, it proves to be not so.…”
Section: Methodsmentioning
confidence: 86%
“…The main components of the experimental set-up shown schematically in figure 1 include the wire frame, its withdrawal mechanism for creating the soap film (not shown), film thickness measurement system, film release electrical circuit by Joule heating (Mayer & Krechetnikov 2017) and high-speed visualization. Figure 1.The experimental apparatus.…”
Section: Experimental Apparatus and Proceduresmentioning
confidence: 99%
“…SDS was chosen for several reasons, one being that it is well characterized and has been used in a number of fluid interface studies (Mysels & Cox 1962; Lyklema, Scholten & Mysels 1965; McEntee & Mysels 1969; Evers, Shulepov & Frens 1996; Huibers & Shah 1997; Berg, Adelizzi & Troian 2005). While the primary use of glycerol is to stabilize the soap film (Mayer & Krechetnikov 2017) and control its thickness, the addition of glycerol may also lead to extraneous ramifications, such as affecting the characteristic time of settling the edge retraction velocity (Savva & Bush 2009) and the kinetics of SDS (Khan et al. 2019).…”
Section: Experimental Apparatus and Proceduresmentioning
confidence: 99%
“…Once the soap film is positioned horizontally, after two steps take place in parallel (the delay is to let the soap film stabilize in the horizontal orientation and relax possible motions in the film caused during the rotation step). First, the soap film is released by impulsive Joule heating of the frame wire (Mayer & Krechetnikov 2017). The energy required for the impulsive heating is stored in a capacitor (C) and delivered to the wire through a thyristor (SCR) in a single high-voltage 2.4 kV electrical pulse.…”
Section: Experimental Apparatus and Proceduresmentioning
confidence: 99%
“…Measurements of the soap film thickness were performed with the help of a collimated broadband light source (Dolan Jenner MI-150) as a light emitter, and a collimating lens/fibre optic cable (Thorlabs M25L02) as a collector of the light transmitted through the soap film, which in turn sends an optical signal to an ultraviolet–visible (UV-VIS) spectrometer (Ocean Optics USB4000-UV-VIS). A detailed explanation of the soap film thickness measurement can be found in Mayer & Krechetnikov (2017). For each test condition, the measurement was repeated three times and the average value reported, with the maximum deviation being in all cases.…”
Section: Experimental Apparatus and Proceduresmentioning
Earlier systematic experimental studies of bursting soap films by McEntee & Mysels (J. Phys. Chem., vol. 73, 1969, pp. 3018–3028) revealed the existence of a precursor shock wave preceding the expanding hole in a punctured film, with a disturbed region of shrinking film material in between known as the ‘aureole’. In the present work we report and interpret new phenomena associated with the aureole – the formation of folds on the surface of soap films. In search of the theoretical explanation of the experimentally identified conditions under which the folds appear, we establish that they correspond to catastrophes of collapsing soap films.
High-speed (2873 fps) visualization of soap film bursting dynamics has been performed by means of equipment available to a high school laboratory. This paper presents the geometry of the experiment and description of the analysis method of the video frames. We carried out the experiments on the bursting of vertical plane soap films using a circular frame with single central and non-central puncture of the film by a needle. The studies were also performed with simultaneous puncture of the film by two needles. Similar research of the films bursting was done using a non-circular frame in the form of a nonconvex hexagon. In all cases, the rupture line has the shape of a circle. For the first time, the displacement of the circular burst center upwards is recorded and explained. Flapping oscillations of the rupture line border at its movement are confirmed. The oscillating character of the rupture line movement is recorded and explained. In addition, we detected formation of the liquid bridge and its destruction at the interaction of two circular bursts with double puncture of the film.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
