Complex singularity analysis for vortex layer flows

RE Caflisch, F Gargano, M Sammartino… - Journal of Fluid …, 2022 - cambridge.org
We study the evolution of a 2D vortex layer at high Reynolds number. Vortex layer flows are
characterized by intense vorticity concentrated around a curve. In addition to their intrinsic …

Formation of curvature singularities on the interface between dielectric liquids in a strong vertical electric field

EA Kochurin, NM Zubarev, OV Zubareva - Physical Review E—Statistical …, 2013 - APS
The nonlinear dynamics of the interface between two deep dielectric fluids in the presence
of a vertical electric field is studied. We consider the limit of a strong external electric field …

Motion of a current-vortex sheet in the magnetic Kelvin-Helmholtz instability

S Baek, SI Sohn - Physical Review E, 2023 - APS
In this paper, we consider the Kelvin-Helmholtz instability in the magnetohydrodynamic flow.
The motion of the interface is described by a current-vortex sheet. We examine the linear …

Two vortex-blob regularization models for vortex sheet motion

SI Sohn - Physics of Fluids, 2014 - pubs.aip.org
Evolving vortex sheets generally form singularities in finite time. The vortex blob model is an
approach to regularize the vortex sheet motion and evolve past singularity formation. In this …

[HTML][HTML] Kelvin-Helmholtz instability and roll-up

C Matsuoka - Scholarpedia, 2014 - scholarpedia.org
Kelvin-Helmholtz Instability (KHI)(Helmoltz 1868, Kelvin 1871) is a hydrodynamic instability
in which immiscible, incompressible, and inviscid fluids are in relative and irrotational …

Regularized Euler- motion of an infinite array of vortex sheets

RE Caflisch, F Gargano, M Sammartino… - Bollettino dell'Unione …, 2017 - Springer
We consider the Euler-α α regularization of the Birkhoff–Rott equation and compare its
solutions with the dynamics of the non regularized vortex-sheet. For a flow induced by an …

Vortex simulations of the Kelvin–Helmholtz instability with surface tension in density-stratified flows

S Shin, SI Sohn, W Hwang - European Journal of Mechanics-B/Fluids, 2018 - Elsevier
In this paper, we study long-time evolutions of the Kelvin–Helmholtz instability with surface
tension and density jump by using the vortex sheet model. Applying a spectrally accurate …

Simple and efficient numerical methods for vortex sheet motion with surface tension

S Shin, SI Sohn, W Hwang - International Journal for Numerical …, 2014 - Wiley Online Library
We present two simple and efficient explicit methods for the vortex sheet with surface
tension. The first one is the standard point vortex method, which has been known to be …

Up-wind difference approximation and singularity formation for a slow erosion model

GM Coclite, F Gargano, V Sciacca - … : Mathematical Modelling and …, 2020 - esaim-m2an.org
We consider a model for a granular flow in the slow erosion limit introduced in [31]. We
propose an up-wind numerical scheme for this problem and show that the approximate …

On the generation and evolution of heated vortex rings in viscous fluids

S Advaith, KT Aswathi, S Basu - European Journal of Mechanics-B/Fluids, 2022 - Elsevier
Vortex rings are turbulent coherent structures that are ubiquitous in various application
domains ranging from gas turbines to aquatic locomotion. The vortex rings are highly …