Abstract
We consider a time dependent Stokes problem that is motivated by two-phase incompressible flow problems with surface tension. The surface tension force results in a right-hand side functional in the momentum equation with poor regularity properties. As a strongly simplified model problem we treat a Stokes problem with a similar time dependent nonsmooth forcing term. We consider the implicit Euler and Crank-Nicolson methods for time discretization. The regularity properties of the data are such that for the Crank-Nicolson method one can not apply error analyses known in the literature. We present a convergence analysis leading to a second order error bound in a suitable negative norm that is weaker that the \(L^2\)-norm. Results of numerical experiments are shown that confirm the analysis.
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The authors thank the referees for their comments, which resulted in substantial modifications of the first version of this paper.
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Reusken, A., Esser, P. Analysis of time discretization methods for Stokes equations with a nonsmooth forcing term. Numer. Math. 126, 293–319 (2014). https://doi.org/10.1007/s00211-013-0564-2
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DOI: https://doi.org/10.1007/s00211-013-0564-2