Applications of Bubble Dynamics in Ocean Engineering: Theory, Experiment and Simulation

Dear Colleagues,

Bubble dynamics have been focused on since the Renaissance and foreshadowed by Leonardo da Vinci, who observed spiral floating bubbles. Many researchers have paid continuous attention to this topic for centuries. In ocean engineering, bubble dynamics are widely used, such as in marine resource exploration, surface cleaning, and underwater explosions, as well as acoustic detecting, etc. The purpose of this Special Issue is to publish the most exciting research with respect to the above subjects and show state-of-the-art scientific achievements. Research that uses theoretical, experimental or numerical methods to explain new bubble dynamics or the new applications of bubbles, especially in ocean engineering, may fit this Special Issue perfectly.

Dr. Xiao Huang
Prof. Dr. Abdellatif Ouahsine
Dr. Peng Du
Guest Editors

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• bubble dynamics
• cavitation
• ultrasonic bubbles
• ultra-fine bubbles
• air-gun bubbles
• underwater explosion bubbles
• bubbly flow

Title: Study of the Underwater Explosion Damage to the Stiffened Double-shell Cylinder

Abstract: Conducting research on the damage characteristics of cylindrical shell structures under the effects of underwater explosive shockwave loads and bubble flooding loads is of significant importance for enhancing the impact resistance of submarines, which primarily rely on cylindrical shell structures as their pressure-bearing components. In this study, a numerical model is established based on the Arbitrary Lagrange-Euler (ALE) method to simulate the damage process of cylindrical shells under underwater explosive loads. Initially, experiments on water jet flow near the rupture plate are conducted and compared with simulation results to validate the effectiveness of the numerical model. Subsequently, the propagation of shockwaves and their effects on cylindrical shell structures are simulated to investigate the damage characteristics of reinforced cylindrical shell structures under underwater explosive. Different damage patterns of cylindrical shell structures under various conditions are analyzed. It is observed that under specific conditions, after the outer shell of the structure is damaged by shockwave loads, the internal structure is subjected to the impact of bubble flooding (high-speed jets), resulting in internal structural damage.This research lays the foundation for improving the impact resistance of underwater vessels and provides reference for the design of novel structures.