Initial Stage of an Oblique Impact of a Large Solid Sphere on a Water Layer

Carrat, Jean-Bastien; Shmakova, Natalia; Cherdantsev, Andrey V.; Гаврилов, Н. М.; Ermanyuk, Evgeny V.

doi:10.1134/s0021894421040106

Cited by 1 publication

(2 citation statements)

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“…Therefore, it is possible to use relatively simple experimental techniques (Carrat et al. 2021; Cherdantsev et al. 2021; Jain, Gauthier & van der Meer 2021 a ) to reconstruct the interface deformation prior to contact.…”

Section: Introductionmentioning

confidence: 99%

“…The advantage of such studies, as compared to investigation of genuine droplet impacts with flat or structured surface, is the opportunity to observe the evolution of the air cushion at larger spatial and temporal scales. Therefore, it is possible to use relatively simple experimental techniques (Carrat et al 2021;Cherdantsev et al 2021;Jain, Gauthier & van der Meer 2021a) to reconstruct the interface deformation prior to contact. Let us note that the impact of a body onto the free surface of a liquid, with and without an air cushion, is an important problem in numerous engineering applications (Korobkin & Pukhnachov 1988;Ross & Hicks 2019).…”

Section: Introductionmentioning

confidence: 99%

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Air entrapment at impact of a conus onto a liquid

et al. 2023

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In this experimental work, a conus impacts a deep liquid pool at a speed varying from 1.3 to $19.0\ {\rm cm}\ {\rm s}^{-1}$ . Two liquids (2.5 % butanol–water solution or distilled water) and four coni made from duralumin with a diameter of 180 mm and different deadrise angles $\beta$ ( $2^{\circ }$ , $3^{\circ }$ , $4^{\circ }$ and 5 $^{\circ }$ ) are tested. An air cushion is trapped between the conus solid surface and the liquid. Several types of bubble patterns after the collapse of the air cushion are observed: one or multiple bubbles near the conus centre (vertex), irregular trails of bubbles on the conus surface and a ring of bubbles in a ‘necklace’-shaped arrangement. With a total internal reflection set-up and appropriate image post-processing, the external and internal radii of the ring-shaped wetted area are estimated for each frame. The external (internal) radius increases (decreases) in time following a linear (exponential) law. The speed of the outer border of the wetted area is in agreement with the Wagner theory for a body impacting onto a liquid. The initial radius of the annular touchdown region is estimated as the intersection of the relevant fitting curves. In the studied range of parameters, the initial radius obeys a universal scaling law, which follows from the air–water lubrication–inertia balance.

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Section: Introductionmentioning

confidence: 99%