Splash formation by a spherical body plunging into water

Kubota, Yoshihiro; Mochizuki, Osamu

doi:10.1007/bf03181877

Cited by 10 publications

(18 citation statements)

References 10 publications

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“…In a previous work [4], we confirmed that contaminants common to tap water do not affect splash formation. To acquire sequential side-view images of splash formation, we used a high-speed CMOS camera (Vision Research Inc., Phantom v7.1) set at 4000 fps.…”

Section: Splash From Inanimate Objectssupporting

confidence: 83%

“…The maximum film velocity for the hydrophilic object at V i = 3.1 m/s is more than twice that for s = 0 (i.e., acrylic object), which we attribute to the film separating from the surface of the object [4]. The film separates when the centrifugal force acting on the film becomes greater than the surface tension of the film [4] [15]. The film velocity increases with swelling, which indicates that hydrophilicity is related to splash formation.…”

Section: Effect Of Splash Formation With a Surface Conditionmentioning

confidence: 72%

“…Bussmann et al used the Rayleigh-Taylor instability theory to discuss the number of fingers that appeared at the edge of a spreading film. In our previous work [4], we show that instability is related to the number of droplets generated at the edge of the film flow. For a sphere plunging through a water surface, such droplets are generated by the primary splash that appears during the first stage of the splash.…”

Section: Introductionmentioning

confidence: 73%

“…In a previous work [4], we studied the splashes formed by a solid sphere plunging into water [4] and categorized splash patterns according to impact velocity. In addition, we discussed in [4] the characteristics of the film flow generated at the early stages of the splash when a body impacted a water surface. We numerically studied the influence of strength on hydrophilicity in splash formation [5].…”

Section: Introductionmentioning

confidence: 99%

“…These materials result in a distinctive affinity of body and water. Figure 1 shows a tree diagram of splash patterns at different time intervals [4] [14] [15]. The evolution of the splash depends on the impact velocity.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Splash Formation Due to a Frog Diving into Water

Kubota¹,

Mochizuki²

2015

WJM

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Herein, we present the results of our experimental investigation of splashes formed by a frog diving into water from the ground or from a leaf and the accompanying sound generated by the impact of the frog on the water. The experiments are performed by visualizing the flow with a highspeed camera. In addition, we used physical models comprising hydrophilic bodies made from hydrogel or acrylic resin to experimentally study how hydrophilicity affects the splash. In these experiments, we use the degree of swelling to define the hydrophilicity degree. The results show that different splashes are caused by the increase in water-film velocity upon an increase in hydrophilicity. For a body with strong hydrophilicity, at a relatively high film velocity, the water film forms when the body impacts the water surface separates from the body surface. In addition, an aircavity forms when the film separates from the body. We empirically examine the relation between the hydrophilicity degree and film velocity. The results indicate that increased hydrophilicity does not reduce the splash. Therefore, we conclude that reducing of the formation of water from the biomimetic point of view is related to the shape of body.

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Section: Splash From Inanimate Objectssupporting

confidence: 83%