Splash and surface craters (cavities) are ubiquitous phenomena when a mass impacts an air-liquid interface, penetrating the liquid phase from the air side—a process known as water entry. Depending on the impact velocity, the formed splash and cavity might result in four types of water entry: quasi-static, shallow, deep, and surface seal. Although numerous studies have been conducted to investigate different types of water entry, surface seal water entry is not well understood yet due to the complex interaction of the splash curtain with the cavity. This research employs high-fidelity computational fluid dynamics simulations to study the characteristics of surface seal water entry and develop formulations of the time scaling and pressure scaling laws for low and high impact velocities. CFD studies were conducted to analyze surface seal dynamics across low and high-speed regimes (U = 6 to 50 m/s). Our findings suggest that the pressure inside the cavity can be scaled based on the impact velocity, and the dimensionless surface seal time can be scaled by the pressure within the cavity. We propose new scaling laws for pressure and time regarding surface seal cavities, and we also explore the pressure, velocity, and vorticity distributions inside and outside the air cavity, alongside the characteristics of splash dynamics.
| Identifer | oai:union.ndltd.org:unt.edu/info:ark/67531/metadc2356191 |
| Date | 07 1900 |
| Creators | Chand, Chakra Bahadur |
| Contributors | Bostanci, Huseyin, Manzo, Maurizio, Sadat, Hamid |
| Publisher | University of North Texas |
| Source Sets | University of North Texas |
| Language | English |
| Detected Language | English |
| Type | Thesis or Dissertation |
| Format | Text |
| Rights | Public, Chand, Chakra Bahadur, Copyright, Copyright is held by the author, unless otherwise noted. All rights Reserved. |
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