A Computational Investigation into Flow Induced Vibrations in Hard Disk Drives
Description
This monograph is based on the doctoral thesis of the
author at the University of California, Berkeley (2006).
The text outlines a computational investigation of
the turbulent air flow in hard disk drives and the
resulting impact of the flow on the vibrations of
various drive components. This work mainly uses Large
Eddy Simulation (LES) implemented in commercial CFD
codes to simulate the complex flow fields. After the
basic features of the flow are explored, a comparison
of different LES models and several commercial CFD
codes is presented. Extensive validation is performed
with experimental data and grid convergence studies
are described. Finally the LES results are used to
compute the vibrations of the rotating disk and the
head-gimbal assembly (HGA). The HGA vibrations are
also computed with the presence of several flow
mitigation devices. This work will be of interest to
scientists and engineers in the hard drive industry,
general practitioners of CFD, and researchers in the
LES field.
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