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000155430 1001_ $$0P:(DE-Juel1)132268$$aSpeck, Robert$$b0$$eCorresponding Author$$ufzj
000155430 245__ $$aA multi-level spectral deferred correction method
000155430 260__ $$aDordrecht [u.a.]$$bSpringer Science + Business Media B.V$$c2015
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000155430 520__ $$aThe spectral deferred correction (SDC) method is an iterative scheme for computing a higher-order collocation solution to an ODE by performing a series of correction sweeps using a low-order timestepping method. This paper examines a variation of SDC for the temporal integration of PDEs called multi-level spectral deferred corrections (MLSDC), where sweeps are performed on a hierarchy of levels and an FAS correction term, as in nonlinear multigrid methods, couples solutions on different levels. Three different strategies to reduce the computational cost of correction sweeps on the coarser levels are examined: reducing the degrees of freedom, reducing the order of the spatial discretization, and reducing the accuracy when solving linear systems arising in implicit temporal integration. Several numerical examples demonstrate the effect of multi-level coarsening on the convergence and cost of SDC integration. In particular, MLSDC can provide significant savings in compute time compared to SDC for a three-dimensional problem.
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000155430 7001_ $$0P:(DE-HGF)0$$aRuprecht, Daniel$$b1
000155430 7001_ $$0P:(DE-HGF)0$$aEmmett, Matthew$$b2
000155430 7001_ $$0P:(DE-HGF)0$$aMinion, Michael$$b3
000155430 7001_ $$0P:(DE-HGF)0$$aBolten, Matthias$$b4
000155430 7001_ $$0P:(DE-HGF)0$$aKrause, Rolf$$b5
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