کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10357060 | 867847 | 2005 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
p-Multigrid solution of high-order discontinuous Galerkin discretizations of the compressible Navier-Stokes equations
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: p-Multigrid solution of high-order discontinuous Galerkin discretizations of the compressible Navier-Stokes equations p-Multigrid solution of high-order discontinuous Galerkin discretizations of the compressible Navier-Stokes equations](/preview/png/10357060.png)
چکیده انگلیسی
We present a p-multigrid solution algorithm for a high-order discontinuous Galerkin finite element discretization of the compressible Navier-Stokes equations. The algorithm employs an element line Jacobi smoother in which lines of elements are formed using coupling based on a p = 0 discretization of the scalar convection-diffusion equation. Fourier analysis of the two-level p-multigrid algorithm for convection-diffusion shows that element line Jacobi presents a significant improvement over element Jacobi especially for high Reynolds number flows and stretched grids. Results from inviscid and viscous test cases demonstrate optimal hp + 1 order of accuracy as well as p-independent multigrid convergence rates, at least up to p = 3. In addition, for the smooth problems considered, p-refinement outperforms h-refinement in terms of the time required to reach a desired high accuracy level.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational Physics - Volume 207, Issue 1, 20 July 2005, Pages 92-113
Journal: Journal of Computational Physics - Volume 207, Issue 1, 20 July 2005, Pages 92-113
نویسندگان
Krzysztof J. Fidkowski, Todd A. Oliver, James Lu, David L. Darmofal,