A scalable time-space multiscale domain decomposition method: adaptive time scales separation

Jean-Charles Passieux (1) , Pierre Ladevèze (1) , David Néron (1)

1 LMT - Laboratoire de Mécanique et Technologie

This paper deals with the scalability of a time-space multiscale domain decomposition method in the framework of time-dependent nonlinear problems. The strategy which is being studied is the multiscale LATIN method, whose scalability was shown in previous works when the distinction between macro and micro parts is made on the spatial level alone. The ob jective of this work is to propose an explanation of the loss-of-scalability phenomenon, along with a remedy which guarantees full scalability provided a suitable macro time part is chosen. This technique, which is quite general, is based on an adaptive separation of scales which is achieved by adding the most relevant functions to the temporal macrobasis automatically. When this method is used, the numerical scalability of the strategy is confirmed by the examples presented.

Mots clés: scalability; multiscale in time and space; domain decomposition; parallel computing; model reduction

Domaines: Mécanique des structures [physics.class-ph]; Mécanique des structures [physics.class-ph]

Jean-Charles Passieux, Pierre Ladevèze, David Néron. A scalable time-space multiscale domain decomposition method: adaptive time scales separation. Computational Mechanics, 2010, 46 (4), pp.621-633. ⟨10.1007/s00466-010-0504-2⟩. ⟨hal-00485747⟩