Investigation of lubricant depletion under a continuous heat source using molecular dynamics simulation

2018 ◽  
Vol 24 (11) ◽  
pp. 4659-4667 ◽  
Author(s):  
Deng Pan ◽  
Andrey Ovcharenko ◽  
Wenping Song ◽  
Xiaowen Qi
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Heat Source ◽  
Dynamics Simulation ◽  
Lubricant Depletion ◽  
Continuous Heat

Effect of Molecular Weight on Lubricant Depletion in a Heat Assisted Magnetic Recording System

2017 ◽  
Author(s):  
Deng Pan ◽  
Wenping Song
Keyword(s):  
Molecular Dynamics ◽  
Molecular Weight ◽  
Molecular Dynamics Simulation ◽  
Magnetic Recording ◽  
Recording System ◽  
Dynamics Simulation ◽  
Disk System ◽  
Heat Assisted Magnetic Recording ◽  
Lubricant Depletion

A model for studying lubricant depletion in HAMR slider/disk system was developed based on molecular dynamics simulation. We found that the lubricant molecular weight has small effect on lubricant depletion.

Effect of Air Bearing Pressure and Slider/Disk Contact on Lubricant Depletion Using Molecular Dynamics Simulation

2020 ◽  
Vol 56 (4) ◽  
pp. 1-4
Author(s):  
Zhengqiang Tang ◽  
Dongdong Zhou ◽  
Tong Jia ◽  
Xiuhua Zhang ◽  
Deng Pan
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Dynamics Simulation ◽  
Air Bearing ◽  
Lubricant Depletion ◽  
Disk Contact

Molecular Dynamics Simulation of Lubricant Depletion Instability under Laser Heating

2015 ◽  
Vol 362 ◽  
pp. 23-28
Author(s):  
Bei Li ◽  
Chee How Wong
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Heat Source ◽  
Laser Beam ◽  
Laser Heating ◽  
Film Structure ◽  
Dynamics Simulation ◽  
Coarse Grained ◽  
Laser Heat ◽  
Laser Heat Source

In this work, the coarse-grained molecular dynamics simulation is employed to study lubricant evolution and depletion when subjected to a moving laser heat source. A layered film structure is formed in the equilibrium lubricant system due to the polar interactions of the lubricant functional end groups with the disk substrate. The lubricant surface morphology and depletion profiles during laser heating are studied. It is shown that the lubricant undergoes severe depletion increasing as the laser heats up with time, resulting in aggravated lubricant diffusion and evaporation. Moreover, the surface temperature profile is examined under a moving laser heat source and it reveals that the increased temperature is centered around the laser beam and quickly decays away from the laser beam. The non-uniform temperature is formed due to heat transfer between heated beads and surrounding beads, which leads to non-uniformity of surface tension and thermocapillary stress, thereby depleting the lubricant away from the scanning laser beam on the disk surface.

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