Impact force reduction by consecutive water entry of spheres

Rabbi, Rafsan; Speirs, Nathan; Kiyama, Akihito; Belden, Jesse; Truscott, Tadd

doi:10.1017/jfm.2020.1165

Cited by 35 publications

(13 citation statements)

References 35 publications

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“…2. The sentence in section 4.2 of "..., close to the critical value mentioned by Rabbi et al (2021) for the water entry of multi-droplet streams." should be changed to "..., close to the critical value mentioned by Rabbi et al (2021) for the water entry of consecutive spheres.…”

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confidence: 82%

“…After publication of the original manuscript, it was realized that the work of Rabbi et al (2021) was not properly referenced. Therefore, the specific reference is listed herein, and the following changes are recommended:…”

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confidence: 99%

“…3. The reference of Rabbi et al (2021) should be added to the last paragraph of the section "2. Experimental methods" and also to the last paragraph of the introduction, respectively, as:…”

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confidence: 99%

“…"The Matryoshka number is a dimensionless parameter defined by the ratio of time interval and pinch-off time as Mt = Δt/t p (Rabbi et al 2021)." "What's more, Yun et al (2020a, b) and Rabbi et al (2021) have conducted some preliminary studies on the cavity dynamics and motion characteristic of two spheres entering into water in tandem configuration with different initial velocities and found that the cavity evolution is completely different as compared to that of single sphere. "…”

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confidence: 99%

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Correction to: Influence of time interval on the water entry of two spheres in tandem configuration

2021

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confidence: 82%

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confidence: 99%

“…3. The reference of Rabbi et al (2021) should be added to the last paragraph of the section "2. Experimental methods" and also to the last paragraph of the introduction, respectively, as:…”

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Correction to: Influence of time interval on the water entry of two spheres in tandem configuration

2021

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“…) The key focus is on the hydroelastic response and its relationship with the momentum exchange. Physical aspects of relevance to the water entry of spheres (Truscott, Epps & Techet 2012;Rabbi et al 2021), wedges (Panciroli, Shams & Porfiri 2015;Wang et al 2022b), viscoelastic droplets (Jalaal, Kemper & Lohse 2019) and other configurations are outside the scope of this study.…”

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confidence: 99%

A fluid–solid momentum exchange method for the prediction of hydroelastic responses of flexible water entry problems

2023

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The paper presents a Fluid Structure Interaction (FSI) method for hydroelastic water entry. The method assumes that the momentum exchange between the fluid and solid body can be used for the calculation of pressure, deformation and stresses arising during impact. The flexible fluid–structure interactions of flat plates entering water are solved using a computational code that employs the finite volume method to discretise both fluid and solid equations. This provides a better matching of momentum on the fluid–solid interface. The momentum arising in the solid body that emerges after the impact is defined as the momentum exchange, and is shown to increase linearly under the increase of non-dimensional impact speed. The ratio of the maximum pressure arising in an elastic body entering water to that of a rigid body is termed relative pressure and is shown to decrease linearly as a function of momentum exchange. The latter verifies the main hypothesis of this paper, namely that ‘the pressure acting on an elastic body can be predicted using an unsophisticated equation that uses the momentum exchange.’ The deformation and stresses arising in elastic plates entering water are demonstrated to be functions of momentum exchange and can be found using simple equations formulated via parametrisation of data. It is concluded that subject to further validation, the method could be extended for the prediction of hydroelastic response of other sections/bodies entering water.

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