Numerical Simulation of the Slider Air Bearing Problem of Hard Disk Drives by Two Multidimensional Upwind Residual Distribution Schemes over Unstructured Triangular Meshes

In this paper we present two multigrid numerical schemes over unstructured triangular meshes that solve the slider air bearing problem of hard disk drives. For each fixed slider attitude, the air bearing pressure is obtained by solving the generalized Reynolds equation. The convection part of the eq...

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Published inJournal of computational physics Vol. 172; no. 2; pp. 640 - 657
Main Authors Wu, Lin, Bogy, D.B.
Format Journal Article
LanguageEnglish
Published Elsevier Inc 20.09.2001
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ISSN0021-9991
1090-2716
DOI10.1006/jcph.2001.6846

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Abstract In this paper we present two multigrid numerical schemes over unstructured triangular meshes that solve the slider air bearing problem of hard disk drives. For each fixed slider attitude, the air bearing pressure is obtained by solving the generalized Reynolds equation. The convection part of the equation is modeled in one scheme by the PSI multidimensional upwind residual distribution approach and in the other scheme by the SUPG finite element approach cast in residual distribution form. In both schemes, a linear Galerkin method is used to discretize the diffusion terms. In addition, a non-nested multigrid iteration technique is used to speed up the convergence rate. Finally, the balanced steady state flying attitude of the slider subject to pre-applied suspension force and torques is obtained by a Quasi–Newton iteration method (Broyden's method), and the results of the numerical solutions are compared to each other and to experimental data.
AbstractList In this paper we present two multigrid numerical schemes over unstructured triangular meshes that solve the slider air bearing problem of hard disk drives. For each fixed slider attitude, the air bearing pressure is obtained by solving the generalized Reynolds equation. The convection part of the equation is modeled in one scheme by the PSI multidimensional upwind residual distribution approach and in the other scheme by the SUPG finite element approach cast in residual distribution form. In both schemes, a linear Galerkin method is used to discretize the diffusion terms. In addition, a non-nested multigrid iteration technique is used to speed up the convergence rate. Finally, the balanced steady state flying attitude of the slider subject to pre-applied suspension force and torques is obtained by a Quasi–Newton iteration method (Broyden's method), and the results of the numerical solutions are compared to each other and to experimental data.
Author Bogy, D.B.
Wu, Lin
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Cites_doi 10.1063/1.869293
10.1016/0141-1195(87)90043-X
10.1115/1.4008375
10.1109/20.800845
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10.1002/(SICI)1097-0207(19970228)40:4<581::AID-NME45>3.0.CO;2-K
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Issue 2
Keywords rarefied gas flows
air bearing
hard disk drive
residual distribution scheme
finite elements
mesh generation and refinement
unstructured meshes
Language English
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Title Numerical Simulation of the Slider Air Bearing Problem of Hard Disk Drives by Two Multidimensional Upwind Residual Distribution Schemes over Unstructured Triangular Meshes
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