Numerical solution of a 1-d elastohydrodynamic problem in magnetic storage devices

Iñigo Arregui; José Jesús Cendán; Carlos Parés; Carlos Vázquez

ESAIM: Mathematical Modelling and Numerical Analysis (2008)

  • Volume: 42, Issue: 4, page 645-665
  • ISSN: 0764-583X

Abstract

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In this work we present new numerical methods to simulate the mechanics of head-tape magnetic storage devices. The elastohydrodynamic problem is formulated in terms of a coupled system which is governed by a nonlinear compressible Reynolds equation for the air pressure over the head, and a rod model for the tape displacement. A fixed point algorithm between the solutions of the elastic and hydrodynamic problems is proposed. For the nonlinear Reynolds equation, a characteristics method and a duality algorithm are developed to cope with the convection dominating and nonlinear diffusion features, respectively. Furthermore, in the duality method the convergence and optimal choice of the parameters are analyzed. At each fixed point iteration, in the elastic model a complementarity formulation is required and appropriate numerical techniques are used. For the spatial discretization different finite element spaces are chosen. Finally, numerical test examples illustrate the theoretical results, as well as the good performance in the simulation of real devices.

How to cite

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Arregui, Iñigo, et al. "Numerical solution of a 1-d elastohydrodynamic problem in magnetic storage devices." ESAIM: Mathematical Modelling and Numerical Analysis 42.4 (2008): 645-665. <http://eudml.org/doc/250330>.

@article{Arregui2008,
abstract = { In this work we present new numerical methods to simulate the mechanics of head-tape magnetic storage devices. The elastohydrodynamic problem is formulated in terms of a coupled system which is governed by a nonlinear compressible Reynolds equation for the air pressure over the head, and a rod model for the tape displacement. A fixed point algorithm between the solutions of the elastic and hydrodynamic problems is proposed. For the nonlinear Reynolds equation, a characteristics method and a duality algorithm are developed to cope with the convection dominating and nonlinear diffusion features, respectively. Furthermore, in the duality method the convergence and optimal choice of the parameters are analyzed. At each fixed point iteration, in the elastic model a complementarity formulation is required and appropriate numerical techniques are used. For the spatial discretization different finite element spaces are chosen. Finally, numerical test examples illustrate the theoretical results, as well as the good performance in the simulation of real devices. },
author = {Arregui, Iñigo, Cendán, José Jesús, Parés, Carlos, Vázquez, Carlos},
journal = {ESAIM: Mathematical Modelling and Numerical Analysis},
keywords = {Head-tape devices; elastohydrodynamic lubrication; compressible Reynolds equation; rod model; duality methods; finite elements.; head-tape devices; finite elements},
language = {eng},
month = {6},
number = {4},
pages = {645-665},
publisher = {EDP Sciences},
title = {Numerical solution of a 1-d elastohydrodynamic problem in magnetic storage devices},
url = {http://eudml.org/doc/250330},
volume = {42},
year = {2008},
}

TY - JOUR
AU - Arregui, Iñigo
AU - Cendán, José Jesús
AU - Parés, Carlos
AU - Vázquez, Carlos
TI - Numerical solution of a 1-d elastohydrodynamic problem in magnetic storage devices
JO - ESAIM: Mathematical Modelling and Numerical Analysis
DA - 2008/6//
PB - EDP Sciences
VL - 42
IS - 4
SP - 645
EP - 665
AB - In this work we present new numerical methods to simulate the mechanics of head-tape magnetic storage devices. The elastohydrodynamic problem is formulated in terms of a coupled system which is governed by a nonlinear compressible Reynolds equation for the air pressure over the head, and a rod model for the tape displacement. A fixed point algorithm between the solutions of the elastic and hydrodynamic problems is proposed. For the nonlinear Reynolds equation, a characteristics method and a duality algorithm are developed to cope with the convection dominating and nonlinear diffusion features, respectively. Furthermore, in the duality method the convergence and optimal choice of the parameters are analyzed. At each fixed point iteration, in the elastic model a complementarity formulation is required and appropriate numerical techniques are used. For the spatial discretization different finite element spaces are chosen. Finally, numerical test examples illustrate the theoretical results, as well as the good performance in the simulation of real devices.
LA - eng
KW - Head-tape devices; elastohydrodynamic lubrication; compressible Reynolds equation; rod model; duality methods; finite elements.; head-tape devices; finite elements
UR - http://eudml.org/doc/250330
ER -

References

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