Abstract
Drop breakup is a familiar event in both nature and technology. In this study, we find that the bag breakup mode can be replaced by a new breakup mode: jellyfish breakup, when the surfactant concentration of a surfactant-laden drop is high. This new breakup mode has a morphology resembling a jellyfish with many long tentacles. This is due to the inhomogeneous distribution of surfactant in the process of drop deformation and breakup. The thin film of liquid can remain stable as a result of the Marangoni effect. Finally, we propose that the dimensionless surfactant concentration can serve as a criterion for breakup mechanisms.
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Acknowledgements
This research was supported by the National Natural Science Foundation of China (21506059), Fundamental Research Funds for the Central Universities (WB1617004), and Shanghai Natural Science Foundation (15ZR1409500).
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Zhao, H., Zhang, WB., Xu, JL. et al. Surfactant-laden drop jellyfish-breakup mode induced by the Marangoni effect. Exp Fluids 58, 13 (2017). https://doi.org/10.1007/s00348-016-2296-4
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DOI: https://doi.org/10.1007/s00348-016-2296-4