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Error estimates of B-spline based finite-element methods for the stationary quasi-geostrophic equations of the ocean

机译:基于B样条的海洋固定准地转方程的有限元方法的误差估计

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This paper presents theoretical error estimates of B-spline based finite-element methods for the streamfunction formulation of the stationary quasi- geostrophic equations, which describe the large scale wind-driven ocean circulation. We introduce variational formulations of the streamfunction formulation inspired by the interior penalty discontinuous Galerkin method. Dirichlet boundary conditions are weakly enforced in the formulations and stabilizations are achieved via Nitsche's method. Existence and uniqueness of the approximation are proved and optimal error estimates in the energy norm are demonstrated under a small data assumption. Numerical experiments are performed to verify the theoretical error estimates on rectangular and L-shape geometries. (C) 2018 Elsevier B.V. All rights reserved.
机译:本文介绍了基于B样条的有限元方法的理论误差估计,该方法用于描述拟大地静止方程的流函数公式,描述了大规模的风动力海洋环流。我们介绍了受内部罚分不连续伽勒金方法启发而产生的流函数公式的变体公式。 Dirichlet边界条件在配方中强制性较弱,并且通过Nitsche方法实现了稳定化。证明了逼近的存在性和唯一性,并在小数据假设下证明了能量范数中的最佳误差估计。进行数值实验以验证矩形和L形几何形状的理论误差估计。 (C)2018 Elsevier B.V.保留所有权利。

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