<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Doklady Physics</journal-id><journal-title-group><journal-title xml:lang="en">Doklady Physics</journal-title><trans-title-group xml:lang="ru"><trans-title>Доклады Российской академии наук. Физика, технические науки</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2686-7400</issn><issn publication-format="electronic">3034-5081</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">697846</article-id><article-id pub-id-type="doi">10.7868/S3034508125050125</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>ТЕХНИЧЕСКИЕ НАУКИ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">REGISTRATION OF SOUND PACKETS WHEN A FALLING DROP MERGES WITH A LIQUID IN AN ELECTROSTATIC FIELD</article-title><trans-title-group xml:lang="ru"><trans-title>РЕГИСТРАЦИЯ ЗВУКОВЫХ ПАКЕТОВ ПРИ СЛИЯНИИ ПАДАЮЩЕЙ КАПЛИ С ЖИДКОСТЬЮ В ЭЛЕКТРОСТАТИЧЕСКОМ ПОЛЕ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Chashechkin</surname><given-names>Yu. D.</given-names></name><name xml:lang="ru"><surname>Чашечкин</surname><given-names>Ю. Д.</given-names></name></name-alternatives><email>chakin@ipmnet.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Prokhorov</surname><given-names>V. E.</given-names></name><name xml:lang="ru"><surname>Прохоров</surname><given-names>В. Е.</given-names></name></name-alternatives><email>prohorov@ipmnet.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт проблем механики им. А.Ю. Ишлинского Российской академии наук</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-09-15" publication-format="electronic"><day>15</day><month>09</month><year>2025</year></pub-date><volume>524</volume><issue>1</issue><issue-title xml:lang="en">VOL 524, NO1 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 524, №1 (2025)</issue-title><fpage>76</fpage><lpage>88</lpage><history><date date-type="received" iso-8601-date="2025-12-05"><day>05</day><month>12</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2026-09-15"/></permissions><self-uri xlink:href="https://jdigitaldiagnostics.com/2686-7400/article/view/697846">https://jdigitaldiagnostics.com/2686-7400/article/view/697846</self-uri><abstract xml:lang="en"><p>For the first time, synchronized video recording of the flow pattern and acoustic pressure by a hydrophone was performed during the merging of a falling drop of distilled water with a liquid at rest in an electrostatic field. The generator anode is connected to the tip of a capillary drop dispenser, the flat cathode is placed on the bottom of a pool filled with tap water. In the impact flow mode, when the kinetic energy of the falling drop significantly exceeds its potential surface energy, a reduction in the chronogram duration, a refinement of the flow pattern and an increase in the frequency of the resonant packet are observed when the electrostatic field is applied. The observed changes indicate a strong influence of the electrostatic field on the structure of droplet flows in the phase of formation and separation of gas cavities emitting resonant acoustic signals.</p></abstract><trans-abstract xml:lang="ru"><p>Впервые проведена синхронизованная видеорегистрация картины течения и акустического давления гидофоном при слиянии падающей капли дистиллированной воды с покоящейся жидкостью в электростатическом поле. Анод генератора соединен с наконечником капиллярного дозатора капель, плоский катод размещен на дне бассейна, заполненного водопроводной водой. В импактном режиме течения, когда кинетическая энергия падающей капли существенно превышает ее потенциальную поверхностную энергию, в электростатическом поле отмечается сокращение длительности хронограммы, измельчение картины течения и повышение частоты резонансного пакета. Наблюдаемые изменения указывают на сильное влияние электростатического поля на структуру капельных течений в фазе формирования и отрыва газовых полостей, излучающих резонансный акустический сигнал.</p></trans-abstract><kwd-group xml:lang="en"><kwd>drop</kwd><kwd>separation</kwd><kwd>gravity</kwd><kwd>electrostatics</kwd><kwd>surface</kwd><kwd>collision</kwd><kwd>cavity</kwd><kwd>evolution</kwd><kwd>gas bubble</kwd><kwd>acoustics</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>капля</kwd><kwd>отрыв</kwd><kwd>гравитация</kwd><kwd>электростатика</kwd><kwd>поверхность</kwd><kwd>столкновение</kwd><kwd>каверна</kwd><kwd>эволюция</kwd><kwd>газовый пузырь</kwd><kwd>акустика</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Эксперименты выполнены на стенде ДЗК УИУ "ГФК ИПМех РАН". Высокоскоростной Блок подготовки данных (БПД) разработан и изготовлен по гранту РНФ № 19-19-00598 "Гидродинамика и энергетика капли и капельных струй: формирование, движение, распад, взаимодействие с контактной поверхностью". Работа выполнена при поддержке Минобрнауки России в рамках госзадания № 124012500442-3.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Mudiar D., Pawar S., Gopalakrishnan V. et al. Electric field enlarges rain drops beneath electrified clouds: Observational evidence // Geophysical Research Letters. 2021. V. 48. e2021GL093577. https://doi.org/10.1029/2021GL093577</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Prosperetti A., Ogitz H. The impact of drops on liquid surfaces and the underwater noise of rain // Ann. Rev. Fluid Mech. 1993. V. 25. P. 577–602. https://doi.org/10.1146/annurev.fl.25.010193.003045</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Ipatev A.M., Shurpaev S.N. Etiudy o groze: Ogni sv. El'ma, svechenie voronok smerchei, raznye molnii. M.: Direkt-Media, 2021.</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Zeleny J. The electrical discharge from liquid points, and a hydrostatic method of measuring the electric intensity at their surfaces // Phys. Rev. 1914. V. 3(2). P. 69–91. https://doi.org/10.1103/PhysRev.3.69</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Tucker N., Stanger J., Staiger M.P. et al. The history of the science and technology of electrospinning from 1600 to 1995 // J. Eng. Fibers Fabr., Special iss. 2012. V. 7(2). P. 63–71. https://doi.org/10.1177/155892501200702510</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Wesdeniotis C., Williams-Pavlantos K., Keating A. et al. Mass spectrometry of polymers: A tutorial review // Mass Spectrom. Rev. 2023. V. 43. Iss. 3. P. 472–476. https://doi.org/10.1002/mas.21844</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Chashechkin Yu.D., Prokhorov V.E. Vliianie elektricheskogo polia na dinamiku strukturnykh komponentov techeniia pri gravitatsionnom otryve kapli vody // Izvestiia RAN. Mekhanika zhidkosti i gaza. 2024. № 3. S. 29–42.</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Löwe J., Kempf M., Hinrichsen V. Mechanical and Electrical Phenomena of Droplets Under the Influence of High Electric Fields // Droplet Dynamics Under Extreme Ambient Conditions / Eds. K. Schulte, C. Tropea, B. Weigand. Cham: Springer, 2022. https://doi.org/10.1007/978-3-031-09008-0_18</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Santra S., Behera N., Chakraborty S. Modulating droplet electrophydrodynamics via the interplay of extensional flow and an alternating current electric field // Physics of Fluids. 2024. V. 36. 102017. https://doi.org/10.1063/5.0231224</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Chashechkin Yu.D., Prokhorov V.E. Aero- i gidroakustika udara svobodno padaiushchei kapli o poverkhnost' vody // DAN. 2010. T. 434. № 1. S. 51–55.</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Sanderson H., Czub M., Jakacki J. et al. Environmental impact of the explosion of the Nord Stream pipelines // Sci. Rep. 2023. V. 13. 19923. https://doi.org/10.1038/s41598-023-47290-7</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Kathiravelu G., Lucke T., Nichols P. Rain Drop Measurement Techniques: A Review // Water. 2016. V. 8. № 1. 29. https://doi.org/10.3390/w8010029</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Guo Zhen Z., Zhao Hui L., De Yong F. Experiments on ring wave packet generated by water drop // Chin. Sci. Bull. 2008. V. 53. P. 1634–1638. https://doi.org/10.1007/s11434-008-0246</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Prokhorov V.E. Underwater gas bubbles produced by droplet impact: mechanism to trigger volumetric oscillations // Phys. Fluids. 2023. V. 35. 033314. https://doi.org/10.1063/5.0140484</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Chashechkin Yu.D., Ilinykh A.Y. Intrusive and impact modes of a falling drop coalescence with a target fluid at rest // Avions. 2023. V. 12. № 4. 374. https://doi.org/10.3390/axioms12040374</mixed-citation></ref><ref id="B16"><label>16.</label><mixed-citation>Landau L.D., Lifshits E.M. Gidrodinamika. M.: Nauka, 1986.</mixed-citation></ref><ref id="B17"><label>17.</label><mixed-citation>Chashechkin Yu.D. Foundations of engineering mathematics applied for fluid flows // Avions. 2021. V. 10. 286. https://doi.org/10.3390/axioms10040286</mixed-citation></ref><ref id="B18"><label>18.</label><mixed-citation>Feistel R. Thermodynamic properties of seawater, ice and humid air: TEOs-10, before and beyond // Ocean Sciences. 2018. V. 14. P. 471–502.</mixed-citation></ref><ref id="B19"><label>19.</label><mixed-citation>Notz P.K., Basaran O.A. Dynamics of drop formation in an electric field // J. Colloid Interface Sci. 1999. V. 213. № 1. P. 218–237. https://doi.org/10.1006/jcis.1999.6136</mixed-citation></ref><ref id="B20"><label>20.</label><mixed-citation>UIU "GFK IPMekh RAN": Gidrofizicheskii kompleks dlia modelirovaniia gidrodinamicheskikh protsessov v okruzhaiushchei srede i ikh vozdeistviia na podvodnye tekhnicheskie ob"ekty, a takzhe rasprostraneniia primesei v okeane i atmosfere. https://ipmnet.ru/uniqequjp/gfk/</mixed-citation></ref><ref id="B21"><label>21.</label><mixed-citation>Chashechkin Yu.D. Zakonomernosti raspredeleniia veshchestva svobodno padaiushchei okrashennoi kapli v prozrachnoi prinimaiushchei zhidkosti (obzor) // Izvestiia RAN. Mekhanika zhidkosti i gaza // 2025. № 1. S. 34–76.</mixed-citation></ref><ref id="B22"><label>22.</label><mixed-citation>Prokhorov V.E. Acoustics of oscillating bubbles when a drop hits the water surface // Phys. Fluids. 2021. V. 33. 083314. https://doi.org/10.1063/5.0058582</mixed-citation></ref><ref id="B23"><label>23.</label><mixed-citation>Chashechkin Yu.D., Il'inykh A.Iu. Razryv spadaiushchego vspleska – dinamicheskogo sleda sliianiia svobodno padaiushchei kapli s pokoiashcheisia prinimaiushchei zhidkost'iu // Doklady RAN. Fizika, tekhnicheskie nauki. 2022. T. 505. S. 50–58.</mixed-citation></ref><ref id="B24"><label>24.</label><mixed-citation>Gillon G., Dere C., Genevaux J.-M. et al. A new insight on a mechanism of air-borne and underwater sound of a drop impacting a liquid surface // Phys. Fluids. 2020. V. 32. № 6. 062004.</mixed-citation></ref><ref id="B25"><label>25.</label><mixed-citation>Li E.Q., Thoraval M.-J., Marston J.O. et al. Early azimuthal instability during drop impact // J. Fluid Mech. 2018. V. 848. P. 821–835. https://doi.org/10.1017/jfm.2018.383</mixed-citation></ref></ref-list></back></article>
