Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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A numerical study on a chaotic stirring in a model for a single screw extruder

압출용 스크류 모델에서의 혼돈적 교반

  • 서용권 (동아대학교 기계공학과) ;
  • 김용균 (동아대 대학원 기계공학과) ;
  • 문종춘 (경동전문대 건축설비과)
  • Published : 1997.12.01
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Abstract

Numerical study on the chaotic stirring of the screw extruder model proposed has been performed. The velocity field was used in obtaining the trajectories of passive particles for studying the stirring effect of the screw extruder. Two nonlinear dynamical tools, that are Poincare sections and Lyapunov exponents, were used in analysing the stirring effect. The Poincare sections and the Lyapunov exponents show that the stirring effect is most satisfactory, when n(the number of flights in a section) is 1, for the case a (aspect ratio ; flight height divided by the spacing between flights) being O.1. It is also required to set n=3, or 5 at a= 0.2, 0.3 for a uniform stirring.

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References

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