Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Evaluation of a multilevel algorithm to study the hydrodynamic behavior of journal bearings
Submission Author:
Leandro Ito Ramos , SP
Co-Authors:
Gregory Bregion Daniel, Leandro Ito Ramos
Presenter: Leandro Ito Ramos
doi://10.26678/ABCM.COBEM2017.COB17-1486
Abstract
This work aims to evaluate the Full Multigrid (FMG) algorithm performance when solving a journal bearing lubrication problem under static load condition. Journal bearing’s hydrodynamic behaviour is described through the classical Reynolds equation, which is evaluated with the Finite Volume Method (FVM). The discrete equations are then solved with FMG. Approximated error norm’s convergence behaviour is observed while varying the number of levels, number of pre and post-relaxations and type of correction cycle, which can be type V or type W. Results show that a W-cycle doesn’t diminishes significantly the error. Also, a greater number of pre and post-relaxations provides a faster convergence of the approximated error norm. Furthermore, computational time spent for the FMG algorithm to solve a problem seems to be largely defined for coarsest grid’s number of volumes, which is directly related to the number of levels used in FMG.
Keywords
Journal Bearing, Hydrodynamic lubrication, multilevel method, Full Multigrid algorithm
