Adaptive multilevel method for the air bearing problem in hard disk drives
Resource
Tribology International,37,473-480.
Tribology International 37: 473-480
Journal
Tribology International
Pages
473-480
Date Issued
2004
Date
2004
Author(s)
Abstract
An adaptive grid-generating algorithm is constructed and integrated with the multigrid method to form a numerical scheme that suits slider air-bearing simulation of hard disk drives. The relative truncation error, a by-product of the multigrid method, is used in grid adaptation criteria. Finer meshes are constructed over nodes of the current finest grid where the relative truncation error exceeds a predetermined tolerance. The union of these finer meshes forms a new level of grid, which may not cover the entire domain of the coarse grid underneath. The final grid system thus constructed is composed of levels of uniform grids with decreasing mesh sizes. This composite grid structure incorporates with numerical resolution as needed and efficiency of computation. A shaped rail, negative pressure slider is used to demonstrate the effectiveness of this numerical scheme. Compared with the traditional multigrid method, the proposed adaptive multilevel method can significantly reduce the computation work for achieving the same level of accuracy. © 2004 Elsevier Ltd. All rights reserved.
Subjects
Gas-lubricated bearings; Hard disk drives; Numerical analysis; Reynolds equation
Other Subjects
Adaptive algorithms; Approximation theory; Bearings (machine parts); Boundary conditions; Computer simulation; Flow of fluids; Pressure distribution; Gas-lubricated bearings; Reynolds equations; Hard disk storage
Type
journal article
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