A Packet of Short Annular Perturbations around a Crown in the Initial Stage of Merging of a Free Falling Drop with a Fluid at Rest in the Impact Regime.
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| Title: | A Packet of Short Annular Perturbations around a Crown in the Initial Stage of Merging of a Free Falling Drop with a Fluid at Rest in the Impact Regime. |
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| Authors: | Khaiirbekov, S. K.1 (AUTHOR), Chashechkin, Yu. D.1 (AUTHOR) chakin@ipmnet.ru |
| Source: | Fluid Dynamics. Dec2025, Vol. 60 Issue 7, p1-13. 13p. |
| Subjects: | Capillary waves, Impact (Mechanics), Moisture, Fluid dynamics, Oscillations, Perturbation theory |
| Abstract: | The paper presents selections from a videofilm illustrating the rapid evolution of the fine flow structure during the merging of a water drop free-falling into a laboratory pool with tap water. In the initial stage of merging in the impact regime a packet of running periodic annular perturbations around the growing crown was visualized for the first time. The motion of the packet consisting of five to seven rings was traced according to the motion of a group of specks reflected from inclined sections of the fluid surface. The radial distances between the crests of perturbations in the packet (analogs of wavelengths) increase monotonically with the distance from the source. The time dependences of the lengths of individual components and the entire packet of annular perturbations, the velocities of its leading and trailing edges, and the frequency of disturbances at chosen points were determined. The dependences of the component dimensions on the frequency, as well as the cyclic frequency on the wave number of perturbations, were calculated. The conventional annular capillary waves of greater length are formed with a certain delay; they catch up the package of primary non-stationary disturbances and absorb them. [ABSTRACT FROM AUTHOR] |
| Copyright of Fluid Dynamics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 190958018 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A Packet of Short Annular Perturbations around a Crown in the Initial Stage of Merging of a Free Falling Drop with a Fluid at Rest in the Impact Regime. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Khaiirbekov%2C+S%2E+K%2E%22">Khaiirbekov, S. K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chashechkin%2C+Yu%2E+D%2E%22">Chashechkin, Yu. D.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> chakin@ipmnet.ru</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Fluid+Dynamics%22">Fluid Dynamics</searchLink>. Dec2025, Vol. 60 Issue 7, p1-13. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Capillary+waves%22">Capillary waves</searchLink><br /><searchLink fieldCode="DE" term="%22Impact+%28Mechanics%29%22">Impact (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Moisture%22">Moisture</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+dynamics%22">Fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Oscillations%22">Oscillations</searchLink><br /><searchLink fieldCode="DE" term="%22Perturbation+theory%22">Perturbation theory</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The paper presents selections from a videofilm illustrating the rapid evolution of the fine flow structure during the merging of a water drop free-falling into a laboratory pool with tap water. In the initial stage of merging in the impact regime a packet of running periodic annular perturbations around the growing crown was visualized for the first time. The motion of the packet consisting of five to seven rings was traced according to the motion of a group of specks reflected from inclined sections of the fluid surface. The radial distances between the crests of perturbations in the packet (analogs of wavelengths) increase monotonically with the distance from the source. The time dependences of the lengths of individual components and the entire packet of annular perturbations, the velocities of its leading and trailing edges, and the frequency of disturbances at chosen points were determined. The dependences of the component dimensions on the frequency, as well as the cyclic frequency on the wave number of perturbations, were calculated. The conventional annular capillary waves of greater length are formed with a certain delay; they catch up the package of primary non-stationary disturbances and absorb them. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Fluid Dynamics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1134/S0015462825603602 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 1 Subjects: – SubjectFull: Capillary waves Type: general – SubjectFull: Impact (Mechanics) Type: general – SubjectFull: Moisture Type: general – SubjectFull: Fluid dynamics Type: general – SubjectFull: Oscillations Type: general – SubjectFull: Perturbation theory Type: general Titles: – TitleFull: A Packet of Short Annular Perturbations around a Crown in the Initial Stage of Merging of a Free Falling Drop with a Fluid at Rest in the Impact Regime. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Khaiirbekov, S. K. – PersonEntity: Name: NameFull: Chashechkin, Yu. D. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 12 Text: Dec2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 00154628 Numbering: – Type: volume Value: 60 – Type: issue Value: 7 Titles: – TitleFull: Fluid Dynamics Type: main |
| ResultId | 1 |
