New PDF release: Adaptive Discontinuous Galerkin Methods for Non-linear

By Murat Uzunca

ISBN-10: 3319301292

ISBN-13: 9783319301297

ISBN-10: 3319301306

ISBN-13: 9783319301303

The concentration of this monograph is the improvement of space-time adaptive easy methods to remedy the convection/reaction ruled non-stationary semi-linear advection diffusion response (ADR) equations with internal/boundary layers in a correct and effective means. After introducing the ADR equations and discontinuous Galerkin discretization, powerful residual-based a posteriori errors estimators in area and time are derived. The elliptic reconstruction process is then applied to derive the a posteriori errors bounds for the absolutely discrete approach and to acquire optimum orders of convergence.As coupled floor and subsurface movement over huge house and time scales is defined by way of (ADR) equation the tools defined during this booklet are of excessive value in lots of parts of Geosciences together with oil and gasoline restoration, groundwater illness and sustainable use of groundwater assets, storing greenhouse gases or radioactive waste within the subsurface.

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Additional info for Adaptive Discontinuous Galerkin Methods for Non-linear Reactive Flows

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We refer to the studies in [1, 9, 20, 30, 71] and references therein. Being a native approach in evolution problems, a posteriori error estimation based on energy techniques compares the continuous and the discrete solution directly. However, the driven a posteriori error bounds, then, are optimal order in L2 (H 1 )-type norms, but sub-optimal order in L∞ (L2 )-type norms. Further, the nu© Springer International Publishing Switzerland 2016 M.

The major tool to estimate the local errors is the a posteriori error estimation using the approximate solution and the given problem data. There are many studies on a posteriori error estimation most of them based on the energy norm induced by the weak formulation [3, 10, 93, 92, 91]. On the other hand, the local structure of the dG methods make them suitable for adaptive schemes. The convergence analysis of a residual-based a posteriori error estimation using dG was first studied by Karakashian and Pascal [61].

4: Adaptive mesh, quartic elements with DoFs 33690 Chapter 4 Parabolic Problems with Space-Time Adaptivity Application of adaptive dG methods and a posteriori error estimates to problems in geoscience are reviewed recently in [33]. Most of the applications of dG methods in geoscience concern reactive transport with advection [13, 62, 84] and strong permeability contrasts such as layered reservoirs [90] or vanishing and varying diffusivity posing challenges in computations [72]. The permeability in heterogeneous porous and fractured media varies over orders of magnitude in space, which results in highly variable flow field, where the local transport is dominated by advection or diffusion [85].

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Adaptive Discontinuous Galerkin Methods for Non-linear Reactive Flows by Murat Uzunca

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