VARIETY MODES AND CHAOS IN BUILDING VENTILATION SYSTEM

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  • 建築換気系の多様性とカオス
  • ケンチク カンキケイ ノ タヨウセイ ト カオス

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This paper referred to the existence of the variety modes and the 'chaos' in building ventilation system, and provides the some instances of such varieties and the chaos in both the natural and forced ventilation systems. The numerical calculations were executed by the Newton-method for the network models of a few ventilation systems, and three to seven modes of the variety and the chaos maps were obtained as the natural result of the non-linear system. The Chaos maps were illustrated as the 600×400 dots color diagrams. The patterns of the ventilation chaos have different features in each domain divided by the straight lines which depend on the ventilation directions of main openings. The new evaluation index of the occurrence frequencies of each modes based on the chaos map is proposed in place of the relative assessment by the kinetic 'work' of the ventilation system suggested by ourselves.

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