Document Type : Original Article
Authors
1
Researcher, Industry/University Cooperative Research Center (I/UCRC) in HDD Component, Khon Kaen University, Khon Kaen 40002, Thailand.+
2
Graduate student, Dpt. of Mechanical Engineering, Khon Kaen University, Khon Kaen 40002, Thailand.+
3
Staff, Seagate Technology (Thailand).
4
Assistant Professor, Dpt. of Mechanical Engineering, Khon Kaen University, Khon Kaen 40002, Thailand. Corresponding Author.
5
Assistant Professor, Dpt. of Computer Engineering, Khon Kaen University, Khon Kaen 40002, Thailand.
Abstract
ABSTRACT
Nowadays, the performance of computers has improved very fast. The design
development of data storage devices such as Hard Disk Drive (HDD) has also
improved in order to gain more capacity with less access time. Therefore, the higher
spindle motor speed is needed. This requirement will then directly affect to the airflow
inside the HDD, which is one of the major factors causing the vibration on the recording
head whilst flying on the data track. The objective of this paper is to study on the airflow
in 3.5-inch with 7200-rpm motor speed, single head HDD, one of the most common
HDD models in the current market. Three-dimensional RNG K-epsilon Model will be
used in this study by comparing the airflow of two different models: the former is the
model with air latch and the latter is the model without air latch. The Head Gimbal
Assembly (HGA) position at Outside Disk (OD) position and Inside Disk (ID) position
are also studied. The simulation results with RNG K-epsilon Model showed that by
repositioning the HGA, the airflow inside the HDD is also changed. The airflow inside
the HDD across the arm and the HGA is significant faster when the HGA is positioned
at OD. Therefore, the arm and the HGA at OD position will face the vibration problem
higher than at the ID position. The air latch is found to reduce air velocity about 35%.
The conclusions of this paper would be useful for further study on flow induce vibration
on the HGA.
Keywords
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