Shoaling Internal Solitary Waves and the Formation of Boluses  

作　　者：Hooman Enayati Brian T. Helenbrook Hooman Enayati;Brian T. Helenbrook(Department of Mechanical Engineering, Lafayette College, Easton, PA, USA;Department of Mechanical & Aerospace Engineering, Clarkson University, Potsdam, NY, USA)

机构地区：[1]Department of Mechanical Engineering, Lafayette College, Easton, PA, USA [2]Department of Mechanical & Aerospace Engineering, Clarkson University, Potsdam, NY, USA

出　　处：《Open Journal of Fluid Dynamics》2024年第2期65-82,共18页流体动力学（英文）

摘　　要：An internal solitary wave of elevation in a two-layer density stratified system of an incompressible, viscous and homogeneous fluid was studied. The run-up of a wave of elevation encountering different slopes was investigated numerically based on solving the continuity, Navier-Stokes and convective-diffusion equations within the Boussinesq approximation. The commercial software COMSOL Multiphysics was used to conduct the numerical simulations. For gradual shoals, a bolus formed that transported dense fluid up the shoal. The bolus disappeared when it reached its maximum height on the slope due to the draining of the dense fluid. Various shoal angles were simulated to detect the critical angle above which a bolus does not form. An angle of 30 or less resulted in the formation of a bolus. In addition, the simulations demonstrated that the size of the bolus induced by shallower slopes was larger and that the vertical height traveled by the bolus was insensitive to the slope of the shoal.An internal solitary wave of elevation in a two-layer density stratified system of an incompressible, viscous and homogeneous fluid was studied. The run-up of a wave of elevation encountering different slopes was investigated numerically based on solving the continuity, Navier-Stokes and convective-diffusion equations within the Boussinesq approximation. The commercial software COMSOL Multiphysics was used to conduct the numerical simulations. For gradual shoals, a bolus formed that transported dense fluid up the shoal. The bolus disappeared when it reached its maximum height on the slope due to the draining of the dense fluid. Various shoal angles were simulated to detect the critical angle above which a bolus does not form. An angle of 30 or less resulted in the formation of a bolus. In addition, the simulations demonstrated that the size of the bolus induced by shallower slopes was larger and that the vertical height traveled by the bolus was insensitive to the slope of the shoal.

关 键 词：Internal Solitary Waves COMSOL Multiphysics Wave Breaking 

分 类 号：O35[理学—流体力学]