کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
521202 867758 2008 23 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An adaptive multiresolution scheme with local time stepping for evolutionary PDEs
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
An adaptive multiresolution scheme with local time stepping for evolutionary PDEs
چکیده انگلیسی

We present a fully adaptive numerical scheme for evolutionary PDEs in Cartesian geometry based on a second-order finite volume discretization. A multiresolution strategy allows local grid refinement while controlling the approximation error in space. For time discretization we use an explicit Runge–Kutta scheme of second-order with a scale-dependent time step. On the finest scale the size of the time step is imposed by the stability condition of the explicit scheme. On larger scales, the time step can be increased without violating the stability requirement of the explicit scheme. The implementation uses a dynamic tree data structure. Numerical validations for test problems in one space dimension demonstrate the efficiency and accuracy of the local time-stepping scheme with respect to both multiresolution scheme with global time stepping and finite volume scheme on a regular grid. Fully adaptive three-dimensional computations for reaction–diffusion equations illustrate the additional speed-up of the local time stepping for a thermo-diffusive flame instability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational Physics - Volume 227, Issue 8, 1 April 2008, Pages 3758–3780
نویسندگان
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