TY - JOUR

T1 - Initial stage of an oblique impact of a large solid sphere on a large solid sphere on a water layer

AU - Carrat, J. B.

AU - Shmakova, N. D.

AU - Cherdantsev, A. V.

AU - Gavrilov, N. V.

AU - Ermanyuk, E. V.

N1 - Funding Information: The experiments, surface shape reconstruction, and analysis of crater deformation were performed at the Lavrentyev Institute of Hydrodynamics of the Siberian Branch of the Russian Academy of Sciences under financial support of the Russian Science Foundation (Grant No. 19-19-00287). The data analysis with the use of the PTV algorithm was supported by the Novosibirsk State University. The analysis of capillary wave propagation was performed within the framework of the State Contract of the Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of Sciences (State Registration number 121031100246-5). Publisher Copyright: © 2021, Pleiades Publishing, Ltd.

PY - 2021/7

Y1 - 2021/7

N2 - An oblique impact of a spherical segment with a curvature radius of 106.5 mm onto a water layer 20 mm thick is studied up to the instant of the body–liquid contact. The range of the impact angle with respect to the horizontal plane is 90–15°, and the vertical component of velocity for all angles is 10 or 20 mm/s. The measurements are performed by a synthetic schlieren method. The marker displacements are measured by a PTV algorithm. Distributions of the liquid layer thickness in space and time along two horizontal axes are obtained. It is shown that a change in the impact angle does not alter the dynamics of crater deepening and expansion at the initial stage; the crater remains axisymmetric. It is found that the rear slope of the crater becomes steeper in the case with the maximum deviation of the angle from the vertical line, presumably, because of the local decrease in pressure. The characteristics of capillary waves generated by the impact are independent of the impact angle.

AB - An oblique impact of a spherical segment with a curvature radius of 106.5 mm onto a water layer 20 mm thick is studied up to the instant of the body–liquid contact. The range of the impact angle with respect to the horizontal plane is 90–15°, and the vertical component of velocity for all angles is 10 or 20 mm/s. The measurements are performed by a synthetic schlieren method. The marker displacements are measured by a PTV algorithm. Distributions of the liquid layer thickness in space and time along two horizontal axes are obtained. It is shown that a change in the impact angle does not alter the dynamics of crater deepening and expansion at the initial stage; the crater remains axisymmetric. It is found that the rear slope of the crater becomes steeper in the case with the maximum deviation of the angle from the vertical line, presumably, because of the local decrease in pressure. The characteristics of capillary waves generated by the impact are independent of the impact angle.

KW - air trapping

KW - capillary waves

KW - oblique impact

KW - synthetic schlieren method

KW - water entry

UR - http://www.scopus.com/inward/record.url?scp=85120001738&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/c187afdd-94a6-3057-8750-ec198a872857/

U2 - 10.1134/S0021894421040106

DO - 10.1134/S0021894421040106

M3 - Article

AN - SCOPUS:85120001738

VL - 62

SP - 616

EP - 623

JO - Journal of Applied Mechanics and Technical Physics

JF - Journal of Applied Mechanics and Technical Physics

SN - 0021-8944

IS - 4

M1 - 10

ER -