Visualization of quantized vortex dynamics
نویسندگان
چکیده
We discuss an experimental technique developed to visualize quantized vortices in helium II. We illuminate micron-sized solid particles of hydrogen suspended in the fluid, and mark quantized vortex cores within the volume observed by a camera. While, under some circumstances, the particles modify vortex dynamics by the action of viscous drag and by pinning vortex intersections, we do capture basic vortex dynamics such as vortex ring decay, vortex reconnection, and superfluid turbulence.
منابع مشابه
Numerical Study of Quantized Vortex Interaction in theGinzburg-Landau Equation on BoundedDomains
In this paper, we study numerically quantized vortex dynamics and their interaction in the two-dimensional (2D) Ginzburg-Landau equation (GLE) with a dimensionless parameter ε>0 on bounded domains under either Dirichlet or homogeneous Neumann boundary condition. We begin with a review of the reduced dynamical laws for time evolution of quantized vortex centers in GLE and show how to solve these...
متن کاملNumerical Study of Quantized Vortex Interaction in Ginzburg-landau Equation on Bounded Domains
Abstract. In this paper, we study numerically quantized vortex dynamics and their interaction of the two-dimensional (2D) Ginzburg-Landau equation (GLE) with a dimensionless parameter ε > 0 in bounded domains under either Dirichlet or homogeneous Neumann boundary condition. We begin with a review of the reduced dynamical laws for time evolution of quantized vortex centers in GLE and show how to...
متن کاملNumerical Study of Quantized Vortex Interactions in the Nonlinear Schrödinger Equation on Bounded Domains
Abstract. In this paper, we study numerically quantized vortex dynamics and their interactions in the two-dimensional (2D) nonlinear Schrödinger equation (NLSE) with a dimensionless parameter ε > 0 proportional to the size of the vortex core on bounded domains under either a Dirichlet or a homogeneous Neumann boundary condition (BC). We begin with a review of the reduced dynamical laws for time...
متن کاملNumerical Study of Quantized Vortex Interaction in Nonlinear Schrödinger Equation on Bounded Domain
Abstract. In this paper, we study numerically quantized vortex dynamics and their interaction of the two-dimensional (2D) nonlinear Schrödinger equation (NLSE) with a dimensionless parameter ε > 0 on bounded domains under either Dirichlet or homogeneous Neumann boundary condition. We begin with a review of the reduced dynamical laws for time evolution of quantized vortex centers and show how to...
متن کاملQuantized Vortex States and Dynamics in Bose-einstein Condensates
In this thesis, we analytically and numerically study quantized vortex states aswell as their dynamics in rotating Bose-Einstein condensate at extremely low tem-perature.We present an efficient method–gradient flow with discrete normalization tofind the stationary solutions of the Gross-Pitaevskii equation and coupled Gross-Pitaevskii equations. We give a mathematical justif...
متن کامل