Abstract
In this article, we study the dynamic response of a soap film under continuous electromagnetic forcing. The dynamics presented here describe the forcing of a monopole vortex during its generation at the center of the film. This response is quantified by the dimensionless Reynolds and Chandrasekhar numbers. When Chandrasekhar number reaches values near 800, Reynolds number reaches a damping rate. An analysis of the kinetic energy throughout the film shows that its response can be explained by Gibbs and Marangoni elasticity. Upon small forcing, the film shows an fast response after which it maintains its initial speed at all times (Marangoni). For a large forcing however, the speed of the film increases continuously throughout the experiment (Gibbs).
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Acknowledgments
Firstly, the author is grateful to the Geophysical Fluid Dynamics Laboratory of Guadalajara University and to the physics student Carlos F. Alaniz Fabian for his aid during the experiments and the traslation of the manuscript. I appreciate the valuable contributions and suggestions from the anonymous reviewers. The author thank to Dr. Thomas Gorin for his thorough review of the manuscript.
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Gómez, R.C.C. Response of a soap film to a continuous electromagnetic forcing. J Vis 20, 87–95 (2017). https://doi.org/10.1007/s12650-016-0372-8
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DOI: https://doi.org/10.1007/s12650-016-0372-8