FIDYST

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FIDYST
Basic data

developer Fraunhofer ITWM
Current  version 2.16.12
(December 15, 2016)
operating system Linux and Windows
programming language C ++
category Numerical simulation
License proprietary
German speaking No
www.itwm.de

FIDYST is a proprietary software from Fraunhofer ITWM for simulating filaments and fibers in turbulent flows. The name FIDYST is an acronym and is derived from Fiber Dynamics Simulation Tool.

Emergence

In 1995, Fraunhofer ITWM started a research project to simulate paper guidance in a printing press. The flight of paper in the printing press can be viewed as a two-dimensional coupled fluid-structure interaction problem. To describe the dynamics of the paper sheet, the Fraunhofer ITWM used shell models from continuum mechanics , which are equivalent to rod models for filament dynamics . In order to be able to simulate production processes for nonwovens , the Fraunhofer ITWM further developed the Cosserat-Rod models to describe the filament dynamics in turbulent air flows. FIDYST 2007 proved its suitability for practical use. At the 2007 EDANA Symposium, Oerlikon Neumag presented a pilot plant in which, on the basis of FIDYST simulations, improved strength values ​​were achieved in the nonwoven fabrics produced. FIDYST has been commercially available since 2010. In 2012 the switch from C to C ++ took place. Since 2014, FIDYST has not only mastered the simulation of filaments in flows, but also their contact with machine components. The latest module in FIDYST is staple fibers.

commitment

FIDYST can be used to simulate the dynamics of elastic, linear objects in flows in general. Therefore there is a wide range of areas of application for this software tool, but FIDYST has achieved particular importance in the field of textile machine construction and the production of technical textiles. With FIDYST become

  • Spunbond processes,
  • Meltblown processes and
  • Airlay processes

simulated. The simulations of the filament or fiber dynamics can then be used to optimize the geometry of the system and the process parameters. The aim of the optimization is to improve the quality of the nonwovens with reduced energy and material costs.

FIDYST runs on Windows and Linux.

Individual evidence

  1. ↑ Review of International Nonwovens Symposium 2007 EDANA website. Retrieved March 6, 2017.
  2. ↑ S. Gramsch, D. Hietel, R. Wegener: Optimizing spunbond, meltblown, and airlay processes with FIDYST . In: Melliand International . tape 21 , no. 2 , 2015, p. 115-117 .

literature

  • R.Wegener, N.Marheineke, D.Hietel: Virtual production of filaments and nonwovens. In: H. Neunzert, D. Prätzel-Wolters (Hrsg.): Mathematics in the Fraunhofer Institute Problem-driven - Model-based - Solution-oriented . Springer, 2014, ISBN 978-3-662-44877-9 , pp. 105-165 .