Numerical Investigation of Bubble Motion and Dynamic Properties in Turbulent Breaking Waves
Wave breaking and fragmentation represent prevalent physical phenomena within the domain of ship hydrodynamics.This paper undertakes a comprehensive examination of three-dimensional wave breaking through the utilization of adaptive grid refinement techniques.By meticulously scrutinizing the dynamic features associated with wave breaking,the process is systematically deconstructed into five discernible stages:the phase of wave stable development,the occurrence of a free surface slam,the subsequent collapse of the created cavity,the formation of spray jets,and the eventual dissipation following wave breaking.Furthermore,an intricate analysis of the statistical characteristics pertaining to bubble size and velocity is conducted.This analysis reveals a compelling observation:the number density of bubbles adheres to a power-law distribution characterized by-10/3 exponent.Most notably,this statistical investigation underscores that the majority of bubbles display a radius concentrated within the narrow range of 2 to 3 mm.It is also observed that large bubbles swiftly ascend towards the water surface,either rising buoyantly or fragmenting into smaller bubbles.Lastly,an in-depth exploration is carried out to elucidate the interplay between turbulent vortices and the motion of bubbles,with a particular focus on assessing the influence of variations in surface tension on the dynamic characteristics of bubbles.
NETL
NSTL
万方数据
