کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10357341 | 867866 | 2005 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modelling thermal convection with large viscosity gradients in one block of the 'cubed sphere'
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Modelling thermal convection with large viscosity gradients in one block of the 'cubed sphere' Modelling thermal convection with large viscosity gradients in one block of the 'cubed sphere'](/preview/png/10357341.png)
چکیده انگلیسی
A numerical method solving thermal convection problems with variable viscosity in a spherical shell is presented. Several features of earlier programs solving the same problem in Cartesian geometry are adopted because of their efficiency and robustness: finite volume formulation, multigrid flow solver, parallel implementation. A recent composite mesh gridding technique for a spherical surface, termed the 'cubed sphere', has proven to be successful in solving other partial differential equations in geophysical problems. It is used here because of its various advantages: absence of geometrical singularities, same metric on each block, simple coupling of adjacent blocks. In addition, it is a good tool to implement grid-based methods proven efficient in the Cartesian context since it provides a mesh reasonably close to uniform. Although as in the Cartesian case, convergence rates decrease with increasing viscosity gradients, global contrasts up to 106 are obtained at a reasonable cost.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational Physics - Volume 205, Issue 1, 1 May 2005, Pages 269-291
Journal: Journal of Computational Physics - Volume 205, Issue 1, 1 May 2005, Pages 269-291
نویسندگان
Gaël Choblet,