Study of aerodynamic characteristics in hard disk drives by numerical simulation

Author

Shimizu, Hayato ; Tokuyama, Mikio ; Imai, Satomitsu ; Nakamura, Shigeo ; Sakai, Kazuo

Author_Institution

Mech. Eng. Res. Lab., Hitachi Ltd., Ibaraki, Japan

Volume

37

Issue

2

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

831

Lastpage

836

Abstract

The behavior of the air flow inside a hard disk drive is evaluated by a three-dimensional unsteady-flow analysis technique called large eddy simulation (LES). The simulation shows that the fluctuation of the aerodynamic force is strongly correlated with the amplitude of the disk vibration, which causes positioning error of the read/write head. It also shows that the power loss caused by the friction of the air on the disks, which accounts for most of the power consumption of hard disk drives at a high-speed revolution, can be qualitatively predicted

Keywords

aerodynamics; disc drives; hard discs; vibrations; aerodynamic characteristics; air flow; disk vibration; hard disk drives; high-speed revolution; large eddy simulation; positioning error; power consumption; power loss; read/write head; three-dimensional unsteady-flow analysis technique; Aerodynamics; Analytical models; Computational modeling; Equations; Friction; Hard disks; Lubricants; Magnetic heads; Numerical simulation; Stress;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.917625

Filename

917625