Numerical investigation of airflow inside a 1-in hard disk drive

Suriadi, M.A.; Tan, Chok Shiong; Zhang, Q.D.; Yip, T.H.; Sundaravadivelu, K.

doi:10.1016/j.jmmm.2006.01.212

Cited by 11 publications

(12 citation statements)

References 2 publications

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“…To study the airflow pattern inside the tester, the results plotted in vertical and horizontal plane cutting across the hard disk drive air volume. Because there is almost no data as in the open literature [1][2][3][4][5][6][7][8][9] on the heat transfer and flow characteristics in the hard disk drive tester, none of these papers reported the heat transfer and flow characteristics in the tester. In order to obtain the numerical results, unsteady calculations are conducted for flow in the hard disk drive tester and reasonable agreement with the present experimental data as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Two-dimensional numerical model of the axisymmetric deformation of disk was applied to determine the fluid force distributions along the radial direction of the rotating disk. Molki and Nagalla [7] numerically studied on the flow characteristics of [8] numerically investigated the airflow characteristic inside a 1 in hard disk drive. Two models with different actuator arm positions were considered.…”

Section: Introductionmentioning

confidence: 99%

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Heat transfer and flow characteristics in the hard disk drive tester

Naphon

Ratchaneekorn

Kurujareon

2009

International Communications in Heat and Mass Transfer

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heat transfer and flow characteristics in the hard disk drive tester

Naphon

Ratchaneekorn

Kurujareon

2009

International Communications in Heat and Mass Transfer

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“…This is due to the outer area of the disk experiences turbulent flow and higher rate of heat transfer that explains the decrease in temperature trend. As the distance between the disks pans to zero, the airs between the disks behaves like a rigid body rotation [20].…”

Section: Comparison Between the Temperaturementioning

confidence: 99%

Heat Source Analysis of Hard Disk Drives with Different Wall Conditions using Infrared System

Ng¹,

Ng²,

Liu³

2011

ENG

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Increasing performance parameters of hard disk drive (HDD) such as higher capacity and faster data access speed with decreasing physical size make HDD more susceptible to thermal effects. Contact temperature measurement using thermocouple is not suitable for the rotating platter of HDD. Heat analysis using simulation software requires accurate initial parameter setting such as thermal (initial & boundary) conditions of certain regions. Temperature measurement using infrared (IR) system avoids these limitations; it is non-contact, responsive and does not require initial parameter setting. Thermal pattern distribution can be studied from the thermal images. However, emissivity of the target has to be known and calibration of the system is essential for accurate temperature reading. This paper showed that temperature within the HDD increases with ambient temperature and time, but the thermal distribution pattern in the HDD was not affected by different ambient temperatures. Three wall boundary conditions were conducted to study the thermal distribution pattern in the HDD. A solution was then proposed based on the results obtained from the experiments to improve the heat transfer rate and steady state temperature, and reduce the detrimental effects from high thermal generation in future prototypes. Another important finding was that the averaged temperature of the head cap was generally higher compared to that of the disk, as the spindle motor is the primary heat source within the HDD. Heat source analysis of HDD with IR system allows designers to have better visibility of the temperature generated in different components of the HDD. Proper cooling may enhance disk life as well as ensure the stability and integrity of the system.

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“…Simulated airflow [14] and experimented HDD airflows. Figure 12 shows a typical thermal image of the head cap where five points were selected to monitor the overall temperature of the head cap.…”

Section: Figure 15mentioning

confidence: 99%

“…The thermal distribution was analyzed by comparing it to a study conducted to determine the airflow within the HDD [14].…”

Section: Simulated Thermal Distributions Of the Hdd Relating To Airflowmentioning

confidence: 99%

Monitoring and Characterizing of Hard Disk Drive Thermal Sources

Lim

Gao

2009

Heat Transfer Engineering

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The growth of the hard disk drive's (HDD) capacity and its high performance have been instrumental in meeting the demands of a diverse spectrum of applications. However, thermal effects in HDD may cause several problems, such as thermal expansion, which causes read/write error due to misalignment, and thermal protrusion, which may cause contact between the magnetic head and disk, resulting in a HDD crash. To study the effects of temperature generated within an HDD, a Hitachi HDD (operating at 15000 rpm) was subjected to 12 different ambient temperatures, while thermal distributions of its head cap and disk were obtained using an infrared thermography system. The results show that the temperature within the HDD increases with the ambient temperature and time. However, the different ambient temperatures did not affect the thermal distribution pattern within the HDD. By comparing the results with ANSYS simulation, it was noted that the simulated result lacks details on some thermal conditions of certain regions, and the results of the simulated temperatures of the components within the HDD were also observed to be overpredicted.

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Numerical investigation of airflow inside a 1-in hard disk drive

Cited by 11 publications

References 2 publications

Heat transfer and flow characteristics in the hard disk drive tester

Heat transfer and flow characteristics in the hard disk drive tester

Heat Source Analysis of Hard Disk Drives with Different Wall Conditions using Infrared System

Monitoring and Characterizing of Hard Disk Drive Thermal Sources

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