A study of vortex ring generation by a circular disc

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Abstract

A vortex ring is a region where the fluid mostly spins around an imaginary axis line that forms a closed loop. It is a fundamental phenomenon for the fluid passing by an object. In general, there are two methods associated with the axisymmetric vortex generation: fluid discharge from an orifice or a nozzle, and disc start-up instantly. Recent study by Yang (2012) showed that the different mechanisms of vortex generation could lead to a similar formation process and a universal principle of the optimal vortex formation could exist.
Present work is mainly based on a numerical simulation study of disc vortex ring formation. A commercial Computational Fluid Dynamics solver is employed to carry out the simulation. The simulation parameters are selected the same as those of Yang’s (2012) experimental study. The model is built with fluid passing by a 30mm diameter and 2mm thickness disc in a large computational domain. The simulation results are validated with experimental data. By studying the Iso-surface, representative values, i.e. size of both vortex ring and vortex ring core, circulation and kinetic energy during the formation phases of the vortex ring are investigated. Comparison and analyses between the numerical simulation and the experimental data will be given in detail.
Original languageEnglish
Pages1
Number of pages1
Publication statusPublished - 2014
EventUniversity of Strathclyde Research Presentation Day - University of Strathclyde, Glasgow, United Kingdom
Duration: 21 Aug 2014 → …
Conference number: 2014

Exhibition

ExhibitionUniversity of Strathclyde Research Presentation Day
Abbreviated titleRPD
CountryUnited Kingdom
CityGlasgow
Period21/08/14 → …

Keywords

  • vortex ring generation
  • pressure-velocity coupling
  • Rankine vortex theory

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