[Faculty] Fwd: [CSRC.COLLOQUIUM] "An Interdisciplinary View on Vortex Rings: Nature, Physics, Mathematics and Computations"

[Jose Castillo]

[image: SDSU_CSRC Logo.jpg]



DATE:
*Friday, September 18, 2020*



TITLE:

*An Interdisciplinary View on Vortex Rings: Nature, Physics, Mathematics
and Computations*


TIME:
*3:00-4:00PM*




LOCATION:
Join Zoom Meeting -  *https://SDSU.zoom.us/j/91071174391*
<https://sdsu.zoom.us/j/91071174391>



SPEAKER/BIO:

*Dr. Ricardo Carretero, Mathematics and Statistics, San Diego State
University *





ABSTRACT:

We will explore the beautiful and complex world of vortex rings. A vortex
ring is formed when a vortex line (a "twister") is looped back onto itself
creating a close ring that carries vorticity. Vortex rings are commonplace
in fluids. For example, in liquids, many species of marine mammals know how
to create them, play with them and even use them to catch prey! Smoke rings
in gases are also common. In fact not only people can make smoke rings, but
volcanoes and chimneys are also at it!

We will focus on the occurrence of vortex rings in superfluids (fluids
without viscosity) described by the nonlinear Schrödinger equation. We
showcase some of their phenomenology including, internal excitation waves
(Kelvin modes), their mutual interactions, collisions, and scattering
scenarios. We also briefly discuss an efficient computational
implementation for solving the ensuing partial differential equations using
GPU accelerated codes that allow for numerical integration runs of vortex
rings in real time!




Host: Jose Castillo

Note: Videos of previous colloquium talks can be seen on the CSRC website
in the colloquium archive section or on the CSRC YouTube page here
<https://www.youtube.com/channel/UCN0ZEztlmyDqG2pm-Rle_Eg/feed>.





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