Unsteady flow-induced vibration of the slider in a commercial hard disk drive

The Flow-Induced Vibration (FIV) of Head Gimbal Assembly (HGA) occurred as a result of turbulent airflow within the commercial hard disk drive HDD. Therefore, this project aims to conduct an investigation through numerical simulation to determine the characteristics of FIV of the HGA. To perf...

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Main Author: Toh, Jeffrey See Ren.
Other Authors: Huang Xiaoyang
Format: Final Year Project
Language:English
Published: 2013
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Online Access:http://hdl.handle.net/10356/54105
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-541052023-03-04T18:45:48Z Unsteady flow-induced vibration of the slider in a commercial hard disk drive Toh, Jeffrey See Ren. Huang Xiaoyang School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering::Fluid mechanics The Flow-Induced Vibration (FIV) of Head Gimbal Assembly (HGA) occurred as a result of turbulent airflow within the commercial hard disk drive HDD. Therefore, this project aims to conduct an investigation through numerical simulation to determine the characteristics of FIV of the HGA. To perform the simulation, a simplified 2-dimensional Large Eddy Simulation (LES) model was constructed, by having channel flow around a rectangular block with the use of FLUENT in ANSYS Workbench. The variation in pressure and velocity over several nodes of around the HGA was then observed by consolidating the data with the aid of MatLab. From the results obtained and analyzed in the frequency domain, high activities in pressure and x-velocity fluctuations were observed at locations directly above and beneath the HGA plate. This was due to high turbulence in these regions. The results had also shown that pressure fluctuations around the HGA plate were highly related with FIV, with principle peaks occurring at approximately 1.5 kHz, 2.8 kHz, 4.3 kHz. Similarly, principle peaks of velocity fluctuations occurred at the frequencies corresponding to those of pressure fluctuations. Based on the corresponding drag force which was calculated by having the difference of transient pressure between two nodes, it was observed that the drag force had a direct aerodynamic excitation of the FIV on the HGA plate. In conclusion, the characteristics of FIV of the HGA plate could be analysed through the studying the behaviour of pressure and x-velocity fluctuations around the HGA plate. Bachelor of Engineering (Mechanical Engineering) 2013-06-13T08:18:07Z 2013-06-13T08:18:07Z 2013 2013 Final Year Project (FYP) http://hdl.handle.net/10356/54105 en Nanyang Technological University 88 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering::Fluid mechanics
spellingShingle DRNTU::Engineering::Mechanical engineering::Fluid mechanics
Toh, Jeffrey See Ren.
Unsteady flow-induced vibration of the slider in a commercial hard disk drive
description The Flow-Induced Vibration (FIV) of Head Gimbal Assembly (HGA) occurred as a result of turbulent airflow within the commercial hard disk drive HDD. Therefore, this project aims to conduct an investigation through numerical simulation to determine the characteristics of FIV of the HGA. To perform the simulation, a simplified 2-dimensional Large Eddy Simulation (LES) model was constructed, by having channel flow around a rectangular block with the use of FLUENT in ANSYS Workbench. The variation in pressure and velocity over several nodes of around the HGA was then observed by consolidating the data with the aid of MatLab. From the results obtained and analyzed in the frequency domain, high activities in pressure and x-velocity fluctuations were observed at locations directly above and beneath the HGA plate. This was due to high turbulence in these regions. The results had also shown that pressure fluctuations around the HGA plate were highly related with FIV, with principle peaks occurring at approximately 1.5 kHz, 2.8 kHz, 4.3 kHz. Similarly, principle peaks of velocity fluctuations occurred at the frequencies corresponding to those of pressure fluctuations. Based on the corresponding drag force which was calculated by having the difference of transient pressure between two nodes, it was observed that the drag force had a direct aerodynamic excitation of the FIV on the HGA plate. In conclusion, the characteristics of FIV of the HGA plate could be analysed through the studying the behaviour of pressure and x-velocity fluctuations around the HGA plate.
author2 Huang Xiaoyang
author_facet Huang Xiaoyang
Toh, Jeffrey See Ren.
format Final Year Project
author Toh, Jeffrey See Ren.
author_sort Toh, Jeffrey See Ren.
title Unsteady flow-induced vibration of the slider in a commercial hard disk drive
title_short Unsteady flow-induced vibration of the slider in a commercial hard disk drive
title_full Unsteady flow-induced vibration of the slider in a commercial hard disk drive
title_fullStr Unsteady flow-induced vibration of the slider in a commercial hard disk drive
title_full_unstemmed Unsteady flow-induced vibration of the slider in a commercial hard disk drive
title_sort unsteady flow-induced vibration of the slider in a commercial hard disk drive
publishDate 2013
url http://hdl.handle.net/10356/54105
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