Effect of the angle of water entry of a body on the generated wave heights

Козелков, А. С.; Kurkin, A. A.; Pelinovskii, E. N.

doi:10.1134/s0015462816020162

Cited by 12 publications

(4 citation statements)

References 14 publications

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“…The proposed approach is implemented in the LOGOS code used to solve coupled 3D problems of the heat and mass transport with convection, aerodynamics and hydrodynamics on parallel computers [Lashkin et al, 2016;Kozelkov et al, 2016с]. The LOGOS code has been successfully verified and demonstrates good results for a series of different CFD problems, including the simulation of turbulent and unsteady flows [Kozelkov et al, 2016с, 2015a[Kozelkov et al, 2016с, , 2016aVolkov et al, 2014a;Kozelkov & Kurulin 2015], as well as geographical problems [Kozelkov et al, , 2015c[Kozelkov et al, , 2016bPelinovskii et al, 2016]. The multigrid method [Brandt, 1982;Volkov et al, 2013;Lashkin et al, 2016] is used for simulations.…”

Section: Resuls and Discussionmentioning

confidence: 99%

An implicit algorithm of solving Navier–Stokes equations to simulate flows in anisotropic porous media

Козелков

Лашкин²,

Efremov³

et al. 2018

Computers & Fluids

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Section: Resuls and Discussionmentioning

confidence: 99%

An implicit algorithm of solving Navier–Stokes equations to simulate flows in anisotropic porous media

Козелков

Лашкин²,

Efremov³

et al. 2018

Computers & Fluids

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“…The models based on the numerical solution of the Navier-Stokes equations [Ferziger and Peric, 2002], which have become popular in solving the problems of asteroid tsunami, allow simulating a real meteorite entering the water [Kozelkov et al, 2015a[Kozelkov et al, , 2016a. In this paper we solve the Navier-Stokes equations for a two-component (water and air) incompressible fluid in a gravitational field, and both air and water are considered to be incompressible.…”

Section: The Hydrodynamic Model Of the Tsunami Source Based On The Navier-stokes Equationsmentioning

confidence: 99%

Numerical modeling of the 2013 meteorite entry in Chebarkul Lake, Russia

Козелков

Kurkin

Pelinovsky

et al. 2017

Preprint

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Abstract. The results of the numerical simulation of possible hydrodynamic perturbations in Lake Chebarkul (Russia) as a consequence of the meteorite fall of 2013 (Feb. 15) are presented. The numerical modeling is based on the Navier-Stokes equations for a two-phase fluid. The results of the simulation of a meteorite entering the water at an angle of 20 degrees are given. Numerical experiments are carried out both when the lake is covered with ice and when it isn't. The estimation of size of the destructed ice cover is made. It is shown that the size of the observed ice-hole at the place of the meteorite fall is in good agreement with the theoretical predictions, as well as with other estimates. The heights of tsunami waves generated by a small meteorite entering the lake are small enough (a few centimeters) according to the estimations. However, the danger of a tsunami of meteorite or asteroid origin should not be underestimated.

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“…Nair et al [10] numerically simulated the water-entry process of axisymmetric rigid bodies using the volume of fraction model. Kozelkov et al [11] provided the numerical results of the influence of the attack angle of objects on the deformation of free surface. Kamath et al [12] numerically studied the water entry of wedges.…”

Section: Introductionmentioning

confidence: 99%

Effect of Wave Phases and Heights on Supercavitation Flow Field and Dynamic Characteristics of Successively Fired High-Speed Projectiles

Zhang

Wang

Jia

2023

JMSE

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The study of the water entry of successively fired projectiles under a wave environment is of great significance for the development and application of supercavitation weapons. In this paper, the supercavitating flow field of two successively fired projectiles entering water under different wave conditions is numerically simulated by the volume of the fraction model considering the cavitation of water. The motion of projectiles is handled by the overlapping grid technology and the simulated projectiles have six degrees of freedom. The effects of different wave phases and wave heights on the supercavitating flow field and the dynamic loads of the projectiles are studied. The research results show that the wave phase has an effect on the evolution and size of the supercavitation and the effect of the wave phase on the water splash above the free surface is more obvious. The peak of the drag force of the first projectile under conditions of different wave phases with 0.12 m wave height can be reduced by about 50% compared with that under the no-wave condition. The wave phases have an effect on the peak of the drag coefficient, and for the first projectile the peak under the condition of the 180° phase is about 40% lower than that of the 0° phase. The peak of the drag coefficient of the first projectile decreases with the increase in wave height. When the wave height increases from 0.0 m to 0.05 m, the peak value decreases by about 45%. For all conditions, regardless of wave phases or wave heights, the peak of the drag coefficient of the second projectile is obviously much lower than that of the first projectile. Accordingly, the decrease in the velocity of the second projectile is far slower than that of the first one. Negative values of the drag coefficient on the second projectile are observed when the second projectile enters the cavity of the first one.

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Effect of the angle of water entry of a body on the generated wave heights

Cited by 12 publications

References 14 publications

An implicit algorithm of solving Navier–Stokes equations to simulate flows in anisotropic porous media

An implicit algorithm of solving Navier–Stokes equations to simulate flows in anisotropic porous media

Numerical modeling of the 2013 meteorite entry in Chebarkul Lake, Russia

Effect of Wave Phases and Heights on Supercavitation Flow Field and Dynamic Characteristics of Successively Fired High-Speed Projectiles

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