2011
DOI: 10.1007/s00542-011-1374-z
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Experimental study of the flow-structure interactions in an air- or helium-filled hard disk drive geometry

Abstract: The increased rotating speed of the hard disk drive (HDD) causes an unsteady flow field between each stack of disks and leads to flow induced vibration on the slider suspension unit (SSU). This flow induced vibration can reduce the positioning accuracy of the SSU and lead to failure to read or write data. Therefore, reduction of turbulence kinetic energy around the SSU is an important step to improve the performance of the HDD. Several modifications have been investigated in air to decrease the direct effect o… Show more

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Cited by 9 publications
(3 citation statements)
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References 19 publications
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“…For example, Li and Bogy [12] applied a multibody full HDD model and a complete air bearing model to study the HDI failures when the HDD was subjected to different kinds of shocks. However, due to the difficulty of tight seal [14], [15] and expensive cost, the experimental investigations are seldom carried out to study helium-filled HDDs. In addition, there are no simulation results to investigating the difference of the flow-induced HGA vibrations using the same HDD model as the filling gases include air and helium.…”
Section: Introductionmentioning
confidence: 99%
“…For example, Li and Bogy [12] applied a multibody full HDD model and a complete air bearing model to study the HDI failures when the HDD was subjected to different kinds of shocks. However, due to the difficulty of tight seal [14], [15] and expensive cost, the experimental investigations are seldom carried out to study helium-filled HDDs. In addition, there are no simulation results to investigating the difference of the flow-induced HGA vibrations using the same HDD model as the filling gases include air and helium.…”
Section: Introductionmentioning
confidence: 99%
“…The arm insertion determines the level of its effect with stronger flow-field adjustments; thus, the flow is not radially outwards at all locations of the field. Other phenomena in co-rotating systems have been investigated using different quantitative methods such as laser Doppler velocimetry (LDV) (Schuler et al, 1990;Hirono et al, 2004) and particle image velocimetry (PIV) (Ruan et al, 2001;Wu, 2009;Kil et al, 2012). The aforementioned scientists elucidated the flow behaviour and patterns; however, a qualitative approach is essential to delve deeper into the actual flow dynamics within an HDD.…”
Section: Introductionmentioning
confidence: 99%
“…24 Contour plots of TI * of (a) air and (b) helium at the inter-disk mid-plane (Z=0 mm) 5400 rpm.••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 84 4.25 Contour plots of TI * of (a) air and (b) helium at the inter-disk mid-plane (Z=0 mm) at 15000 rpm. ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 85 4.26 Contour plots of TI * of of (a) air and (b) helium at the plane across the flanges (Z= 0.355 mm) at 5400 rpm.••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 86 4.27 Contour plots of TI * of of (a) air and (b) helium at the plane across the flanges (Z= 0.355 mm) at 15000 rpm.•••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 87 4.28 Contour plots of TI * of of (a) air and (b) helium at the plane between the arm and the disk (Z = 0.8 mm) at 5400 rpm.••••••••••••••••••••••••••••••••••••••••••••••••••• 88 4.29 Contour plots of TI * of of (a) air and (b) helium at the plane between the arm and the disk (Z = 0.8 mm) at 15000 rpm.•••••••••••••••••••••••••••••••••••••••••••••••••• 89 4.30 Displacement in X -axis on the center of the magnetic tips at 5400 rpm.…”
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