超大容量硬盘的流场性能研究(英文版)

Preface Chapter 1 Introduction 1 1.1 Basic 1 1.2 Evolution 3 1.3 Motivation 6 1.4 Outline 8 References 9 Chapter 2 Simulation of flow and vibration characteristics in HDD level 11 2.1 Introduction 11 2.2 Fluid-structure interaction simulation model of HGA 12 2.3 Flow-induced HGAvibrations 15 2.4 Operational shock response of HGA 20 2.5 Summary 26 References 27 Chapter 3 Suppressing flow-induced vibrations of HGA by a PZT 29 3.1 Introduction 29 3.2 PZT designed on the cover inner surface 30 3.3 Flow-induced vibrations of HGA 31 3.4 PZT acoustic pressure induced vibrations of HGA 32 3.5 Summary 36 References 37 Chapter 4 Simulation of temperature distribution around laser-heating media in HAMR 38 4.1 Introduction 38 4.2 HAMR HDD model 39 4.3 Temperature distributions around the laser-heating area on the disk surface 42 4.4 Cooling effects of disk rotation and HDI gas bearing 46 4.5 Summary 48 References 49 Chapter 5 Simulation of particles trajectories in HDD considering the trapping criterion，temperature and arm swing 51 5.1 Introduction 51 5.2 Considering the trapping criterion 53 5.2.1 Particle trajectory inside HDD 56 5.2.2 Effects of particle release position 58 5.2.3 Effects of particle size 62 5.3 Effects of temperature on particle trajectories 65 5.3.1 Temperature distribution and velocity distribution 66 5.3.2 Different particle release positions 68 5.3.3 Different particle sizes 72 5.4 Effects of armswing on particle trajectories 75 5.4.1 Characteristics of fluid fields 77 5.4.2 Particle trajectories 80 5.5 Summary 84 References 86 Chapter 6 Numerical simulation of flow characteristics in HDI 88 6.1 Introduction 88 6.2 Simulation method of contaminations on ABS 89 6.2.1 Air bearing simulation 90 6.2.2 The mesh transformation method 91 6.2.3 Air velocity calculation 92 6.2.4 Air shear stress calculation 93 6.2.5 Particle trajectory 93 6.3 Effects of skew angle on the air flow patterns 94 6.3.1 Flying attitudes of slider 94 6.3.2 Effects of skew angle on the air flow velocity patterns 95 6.3.3 Effects of skew angle on the air shear stress patterns 97 6.4 Simulation of air flow and particle trajectories in HDI 98 6.4.1 Model and flying attitudes of slider 98 6.4.2 Air flow patterns and particle trajectories 99 6.5 Summary 105 References 106 Chapter 7 Study of particle trajectory and contamination in HDI 108 7.1 Introduction 108 7.2 Simulation model of particle movement in HDI 109 7.3 Particle movement behaviors in HDI 113 7.3.1 Particle trajectory in HDI 113 7.3.2 Parametric simulation of particle trajectory 114 7.3.3 Particle behaviors in HDI 116 7.3.4 Particle trajectories in the air and helium filled HDI 118 7.4 Summary 120 References 120 Chapter 8 Study of particle adhesion criterion on slider ABS 122 8.1 Introduction 122 8.2 Model and methods of the particle-slider interaction 123 8.3 Interaction between particle and slider 126 8.3.1 Adhesion criterion on the slider surface 126 8.3.2 Particle rebounding from the slider surface 130 8.4 Summary 133 References 134 Chapter 9 Analysis of the adhered particle migration on slider ABS 136 9.1 Introduction 136 9.2 Simulation model of particle migration 137 9.3 Results and discussions 141 9.3.1 Particle migration styles criterion 141 9.3.2 Effect of different factors on particle migration 144 9.3.3 Particle secondary migration trajectories and behaviors 146 9.4 Summary 148 References 148 Chapter 10 Simulation of bearing force over BPM and smooth media in helium-filled drive 151 10.1 Introduction 151 10.2 Model for DSMC simulation 153 10.2.1 DSMC simulation method 153 10.2.2 Slider-disk simulation model 154 10.2.3 Calculation models for temperature and velocity in HDI 156 10.3 Effects of different conditions on bearing force in HDD 157 10.3.1 Total bearing force acting on the slider 157 10.3.2 Component bearing force in HDD 163 10.4 Summary 165 References 166 Chapter 11 Study of perfluoropolyethers lubricant consumption and recovery in HAMR using MD simulation method 168 11.1 Introduction 168 11.2 Molecular dynamics simulation method 170 11.3 3D model of the slider-lubricant-substrate system 170 11.4 PFPE desorption and recovery 173 11.5 Summary 180 References 181 Chapter 12 Study of formation and breaking of lubricant bridge in HDI by MD simulation method 183 12.1 Introduction 183 12.2 3D model of the slider-lubricant-substrate system 184 12.3 Formation and breaking of lubricant bridge 188 12.4 Summary 195 References 196