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Plasma-induced unconventional shock waves on oil surfaces

Li, Guoliang and Hu, Ruiheng and Tang, Jau and Zheng, Huai and Liu, Sheng (2018) Plasma-induced unconventional shock waves on oil surfaces. Scientific Reports, 8 . Art. No. 17813. ISSN 2045-2322. PMCID PMC6292859. http://resolver.caltech.edu/CaltechAUTHORS:20181213-132119256

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Abstract

Electric corona discharge in a multi-phase system results in complex electro-hydrodynamic phenomena. We observed unconventional shock wave propagation on an oil thin film sprayed over a polymer-coated conductor. A hair-thin single shock wave arose when the high voltage bias of an overhung steel needle was abruptly removed. However, such solitary waves possess neither interference nor reflection properties commonly known for ordinary waves, and also differ from the solitons in a canal or an optical fiber. We also observed time-retarded movement for dispersed oil droplets at various distances from the epicenter which have no physical contact, as if a wave propagating on a continuous medium. Such a causality phenomenon for noncontact droplets to move resembling wave propagation could not be possibly described by the conventional surface wave equation. Our systematic studies reveal a mechanism involving oil surface charges driven by reminiscent electric fields in the air when the needle bias is suddenly removed.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1038/s41598-018-36278-3DOIArticle
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6292859PubMed CentralArticle
ORCID:
AuthorORCID
Tang, Jau0000-0003-2078-1513
Liu, Sheng0000-0001-6033-078X
Additional Information:© The Author(s) 2018. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. Received: 23 July 2018. Accepted: 5 November 2018. Published online: 13 December 2018. This work is supported by funding from Wuhan University. Thanks to Junheng Pan for works in the simulation. G. Li acknowledged Prof. Shijing Wu for discussion. This work is supported by funding from Wuhan University. Funder: NSFC Northwest Key Scientific Facility, China Grant number: 51727901 Guoliang Li and Ruiheng Hu contributed equally. Author Contributions: G.L., R.H. and J.T. performed the experiments, G.L. and J.T. proposed the experimental ideas, data analysis and interpretation, and wrote the manuscripts. R.H. proposed the experimental ideas of Fig. 4. S.L. and H.Z. provided administrative assistance and funding support. The authors declare no competing interests.
Funders:
Funding AgencyGrant Number
Wuhan UniversityUNSPECIFIED
National Natural Science Foundation of China51727901
PubMed Central ID:PMC6292859
Record Number:CaltechAUTHORS:20181213-132119256
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20181213-132119256
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91770
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:13 Dec 2018 22:11
Last Modified:02 Jan 2019 15:39

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