Terminal velocities and vortex dynamics of weakly compressible Rayleigh–Taylor Instability
Source abstract
Abstract
The evolution of Rayleigh–Taylor instability (RTI) for weakly compressible fluids was numerically simulated using the smooth particle hydrodynamics method. It was found that the speed of spikes and bubbles in most cases will reach a stable value, which is called terminal speed. The calculated terminal speed of the bubble was found to be systematically higher than the theoretical model based on the potential flow hypothesis. This deviation could be modified by including the vortex effect on the terminal speed of the bubble. A significant correlation between the bubble speed and the vorticity in the bubble head was found during the whole evolution of RTI. The analysis of the vortex dynamics in the bubble head region during the terminal speed stage shows that there is a balance between the baroclinic production, viscous dissipation, and convective transport of the vorticity.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Fluid Dynamics Simulations and Interactions · Particle Dynamics in Fluid Flows · Geological formations and processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Applied Physics, School of Physics and Electronics, Hunan University 1 , Changsha 410082, China
Department of Aerospace Engineering, College of Aerospace Science and Technology, National University of Defense Technology 2 , Changsha 410073, China
Laser Fusion Research Center, China Academy of Engineering Physics 3 , Mianyang, Sichuan, 621900, China
State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology 4 , Xi’an 710024, China
Funding
Foundation of State Key Laboratory of Laser Interaction With Matter · National Natural Science Foundation of China · Natural Science Foundation of Hunan Province, China · National Key Research and Development Program of China · The Fundamental Research Funds for the Central Universities
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