Investigation of Nanoscale Heat Transfer and Flying Characteristics in Thermal Flying Height Control Sliders Considering Near-Field Radiation

Li, L.; Zheng, Hao; Talke, Frank E.

doi:10.1007/s11249-015-0546-x

Cited by 6 publications

(6 citation statements)

References 33 publications

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“…As shown in Figure 5.13, the increments of temperature and protrusion due to the back heating are varying with different radiation models. The results based on L. Li et al (2015) work show much higher temperature and protrusion increments than those from current studies. At 1 and 2 nm of gap spacing, temperature increments are about 90 K and 30 K respectively due to the hot spot back heating alone.…”

Section: 32: Effect Of Gap Spacingcontrasting

confidence: 68%

“…As discussed earlier, L. Li et al (2015) solved the heat transfer problem with TFC sliders considering the thermal conduction and near-field radiation. Their radiation model was based on the assumption of two semi-infinite bodies separated by the gap with evanescent waves.…”

Section: 32: Heat Transfer In Hamr Interface and Near Field Heat Tmentioning

confidence: 99%

“…The numerical results presented here are based on a new thermal radiation model which is derived from Shen et al (2009). It is necessary to compare with another theoretical radiation model derived from L. Li et al (2015) to study the radiation effect at nanoscale gap spacing. As shown in Figure 5.13, the increments of temperature and protrusion due to the back heating are varying with different radiation models.…”

Section: 32: Effect Of Gap Spacingmentioning

confidence: 99%

“…14), L Li et al (2015). andZheng et al, (2010) also developed other heat transfer models for the heat transfer in the narrow air bearing interface with a TFC slider.…”

mentioning

confidence: 99%

“…This is the first-order approach to investigate the near field effects on the heat transfer in HDI. L Li et al (2015). approach for the near field heat transfer was based on the modified Planck blackbody radiation distribution while considering the near-field evanescent wave between two infinite, homogeneous bodies separated by a small gap.…”

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confidence: 99%

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Investigation of transport phenomena in nano-scale head disk interface

Myo¹

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for his valuable guidance, support and patience throughout my Ph.D. study and research. His continuous encouragement helped me completing this research work and thesis. The great advice and caring of my second supervisor; Dr. Zhou Weidong from Data Storage Institute (DSI, A*Star) have been invaluable on both my PhD study and on a personal level, for which I am enormously grateful. During my Ph.D. life in NTU and DSI, I have gained the knowledge, support and experience from my friends and colleagues. I want to express my appreciation for their kind helps and understandings, especially to Dr. Yu Shengkai and Dr. Hua Wei. I would also like to state my thanks to Associate Prof. Yu Peng from South University of Science and Technology of China for his help and support. I would also like to acknowledge the financial support from the Staff Scientific Development Award (SSDA) provided by Data Storage Institute (DSI, A*Star), Singapore here. Last but not the least; I would like to thank my parents, wife and siblings for their supports and encouragements over the years during my study. I certainly could not have completed it without their love and help.

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Section: 32: Effect Of Gap Spacingcontrasting

confidence: 68%

Section: 32: Heat Transfer In Hamr Interface and Near Field Heat Tmentioning

confidence: 99%

Section: 32: Effect Of Gap Spacingmentioning

confidence: 99%

“…14), L Li et al (2015). andZheng et al, (2010) also developed other heat transfer models for the heat transfer in the narrow air bearing interface with a TFC slider.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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Investigation of transport phenomena in nano-scale head disk interface

Myo¹

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A tribo-dynamic contact fatigue model for spur gear pairs

Anisetti

2017

International Journal of Fatigue

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Investigation of heat transfer across a nanoscale air gap between a flying head and a rotating disk

Sakhalkar

Cheng

Ghafari

et al. 2020

Journal of Applied Physics

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Understanding nanoscale heat transfer at the head–disk interface (HDI) is necessary for thermal management of hard disk drives (HDDs), especially for heat-assisted magnetic recording and microwave-assisted magnetic recording. To accurately model the head temperature profile in HDDs, it is imperative to employ a spacing-dependent heat transfer coefficient due to the combined effects of pressurized air conduction and wave-based phonon conduction. Moreover, while flying at near-contact, the fly height and heat transfer are affected by adhesion/contact forces in the HDI. In this study, we develop a numerical model to predict the temperature profile and the fly height for a flying slider over a rotating disk. We compare our simulations with touchdown experiments performed with a flying Thermal Fly-Height Control (TFC) slider with a near-surface Embedded Contact Sensor (ECS), which helps us to detect the temperature change. We incorporate the effects of disk temperature rise, adhesion/contact forces, air and phonon conduction heat transfer, and friction heating in our model. As the head approaches the disk with increasing TFC power, enhanced nanoscale heat transfer leads to a drop in the ECS temperature change vs TFC power curve. We find that the exclusion of the disk temperature rise causes the simulation to overestimate the ECS cooling drop. The incorporation of adhesion force results in a steeper ECS cooling drop. The addition of phonon conduction in the model causes a larger ECS cooling drop. The simulation with friction heating predicts a larger ECS temperature slope beyond contact. The simulation with these features agrees with the experiment.

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Investigation of Nanoscale Heat Transfer and Flying Characteristics in Thermal Flying Height Control Sliders Considering Near-Field Radiation

Cited by 6 publications

References 33 publications

Investigation of transport phenomena in nano-scale head disk interface

Investigation of transport phenomena in nano-scale head disk interface

A tribo-dynamic contact fatigue model for spur gear pairs

Investigation of heat transfer across a nanoscale air gap between a flying head and a rotating disk

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