EFFECTS OF THERMODYNAMICS, NON CONDENSABLE GAS, AND SUPERCRITICAL FLUIDS ON CAVITATION
Abstract
Cavitation bubble collapse is a complex physical phenomenon with practical applications in engineering and naval architecture. The violent collapse of bubbles can produce high-speed liquid jets that can cause detrimental effects on mechanical components and impact the control and stability of underwater vehicles. The pressure generated during multiple cavitation bubble collapses can also leadto adverse effects. During the collapse phase, shock waves and high-speed microjets can induce localized high temperatures (rangingfrom 7000 K to 16,000 K) and high pressures (around 12 GPa), as well as other phenomena like supercritical fluid behavior, non-condensable gas release, plasma formation, and chemical reactions. However, accurately modeling the mixing processes of vapor and liquid, non-condensable gas, and supercritical fluids inside collapsing cavitation bubbles remains challenging.This project aims to develop advanced numerical methodologies to improve the accuracy and efficiency ofpredicting cavitation bubble collapses under various pressure and temperature conditions, in both free field and near walls. The project will focus on investigating the effects of phase change of vapor and liquid, non-condensable gas, and supercritical real fluids on cavitation bubble collapses. New numerical schemes will be developed using modern high-resolution shock-capturing techniques, phase change models, three-phase compressible Navier-Stokes equations model, and properties of ideal to real fluids and supercritical fluids. The numerical methodologies will be validated through state-of-the-art experiments that monitor interface dynamics, velocity, pressure fields, and their impacts on the wall during cavitation bubble collapses in one, two, and three dimensions. Furthermore, the developed numerical program will be applied to analyze relevant problems under various conditions. The outcomes of this project will pave the way for new technologies and approaches inthe design of the next generation of naval platform systems, contributing to advancements in cavitation research and its practical applications.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Oct 13, 2023
- Source ID
- N629092312069
Entities
People
- Warn Gyu Park
Organizations
- Office of Naval Research
- United States Navy