publication . Research . 2008

Numerical study on physical mechanism of vortex breakdown occurrence in spin-up process

小出, 輝明; コイデ, テルアキ; Teruaki, Koide;
Open Access Japanese
  • Published: 01 Mar 2008 Journal: 東京都立産業技術高等専門学校研究紀要 = Research reports of Tokyo Metropolitan College of Industrial Technology, volume 2, pages 70-73
Abstract
A Numerical study presented on a vortex breakdown in spin-up process in an enclosed cylindrical container. In a transitional state, momentary vortex breakdowns can occur for particular parameter values ofthe Reynolds number and aspect ratio where no vortex breakdown appears in a steady state. This transient vortex breakdown flow is convenient to consider a mechanism for the occurrence of a vortex breakdown. It isdiscussed that periodical increase and decrease of angular momentum in upstream of the flow leads to the occurrence of momentary vortex breakdown. Regions for momentary vortex breakdown in spin-upoccurrence are shown in the Re-H/R plane for comparison wi...
Subjects
arxiv: Condensed Matter::Superconductivity
free text keywords: Spin-up Process, Confined Swirling Flow, Vortex Breakdown
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Research . 2008
Provider: JAIRO
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