Transient solutions of the dynamics in film blowing processes

Jae Chun Hyun, Hyunchul Kim, Joo Sung Lee, Hyun Seob Song, Hyun Wook Jung

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The transient behavior and stability of film blowing have been investigated solving the governing equations consisting of the movingboundary partial differential equations. Incorporating an orthogonal collocation on finite elements and a coordinate transformation, a new numerical scheme was devised to obtain previously unavailable transient solutions. The scheme overcomes severe numerical problems, that are encountered especially when the process is in a periodic oscillation called draw resonance. These simulation results provide, for the first time, temporal pictures which are close to those observed experimentally, and enable a systematic analysis of the process as regards its stability, multiplicity, sensitivity and stabilization strategies.

Original languageEnglish
Pages (from-to)157-162
Number of pages6
JournalJournal of Non-Newtonian Fluid Mechanics
Volume121
Issue number2-3
DOIs
Publication statusPublished - 2004 Aug 20

Keywords

  • Coordinate transformation
  • Draw resonance
  • Film blowing
  • Linear stability analysis
  • Multiplicity of steady states
  • Orthogonal collocation
  • Stability diagram
  • Transient response

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Applied Mathematics

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