Partial contact air bearing characteristics of tripad sliders for proximity recording

An Alternative Simulation Method for Calculation of Microgas Flows under Flying Head Sliders

“…The first term of (7) is the slip-less solution of the velocity in the Couette flow when the upper plate is stationary and the lower plate moves towards the right with velocity U (see [9] compare with its (5.63) for ζ = 0), and the second term is the slip-less solution of the velocity in the Poiseuille flow when the x axis is aligned along the lower plate (see [9], the second term of (7) can be obtained from (5.69) in [9] by a simple translation of the ordinate y). Equation (10) shows that the flow rate across any cross section is the sum of the flow rate of the Couette flow and the Poiseuille flow and this rate does not change from one cross section to another in steady flow. In [9] (see (5.73) there) one sees that the flow rate of the Poiseuille flow with slip boundary condition surpasses that of the slip-less case by a factor:…”

“…T is time normalized by 1/ω, ω being angular velocity of the rotating disc, Z, and W is the dimensionless coordinate and velocity in the head width direction z. Fukui and Kaneko [7] used the generalized Reynolds equation and obtained lubrication characteristic results valid for large Knudsen numbers. By using Fukui-Kaneko's generalized Reynolds equations some useful results of the slider design were obtained: Hu et al [10] investigated partial contact air bearing characteristics of tripad sliders. Hu et al [11] investigated the air bearing dynamics of two configurations of authentic sized sub-ambient pressure sliders and found the way to ensure the reliability of the unloading performance of the types of sliders considered.…”

“…Note that the DSMC sample process starts and lasts 0. Figure 9: Configuration of a slider used in simulation in [37], slightly modified from that of [10].…”

“…The equation modified to include slip and transitional effects is still called Reynolds equation. It is essentially a mass conservation relation applied to the cross sections of the squeezed air flow and is obtained from the continuity equation by integrating it over the vertical direction with the employment of the momentum equation, and now the generalized Reynolds equation is in routine use to calculate the air bearing parameters in sliders with complicated air bearing surfaces (see e.g., [3,[10][11][12][13]). The direct simulation Monte-Carlo (DSMC) method [14] is appropriate for simulation of thin film flows in sliders.…”

An Analytical Model of Contact Vibration of Slider

“…2.3. Initial state Figure 5 shows the schematic of the interference height 5) and the model of the interference height used for the simulation. In this study, the degree of interference when the slider is in contact with the media is expressed by the interference height.…”