J0104-1-1 磁気ディスク装置における非定常流れ場の流体情報探査(流体情報学とデータマイニング)

概要

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A hard disk drive (HDD) involves high-speed trailing flow on the rotating disk, which may cause vibration force. In order to reveal the information of flow fields related to the vibration force, this study performed the data mining in the unsteady computational fluid dynamics (CFD) simulation data for HDD flow fields. The present data mining started from the extraction of temporal characteristics from the time-series data of fluid properties given at each grid point, and then moved to the clustering analysis of the grid points based on the similarity of the temporal characteristics. Finally, the clustering results were projected onto a real space of the HDD for discussion. The present results indicated that a significant sequence of flow energy production and dissipation, which leads the vibration force, occurs near the filter entrance, arm root, and shroud wall between them.
2009-09-12