, Volume 13, Issue 8, pp 365-375
Date: 19 May 2011

Least squares approach for initial data recovery in dynamic data-driven applications simulations

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Abstract

In this paper, we consider the initial data recovery and the solution update based on the local measured data that are acquired during simulations. Each time new data is obtained, the initial condition, which is a representation of the solution at a previous time step, is updated. The update is performed using the least squares approach. The objective function is set up based on both a measurement error as well as a penalization term that depends on the prior knowledge about the solution at previous time steps (or initial data). Various numerical examples are considered, where the penalization term is varied during the simulations. Numerical examples demonstrate that the predictions are more accurate if the initial data are updated during the simulations.

Communicated by Gabriel Wittum.
Research of the authors is partially supported by NSF grant ITR-0540136 and by award KUS-C1-016-04, made by King Abdullah University of Science and Technology (KAUST).