کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
498443 | 862993 | 2012 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enforcing positivity with conservation for nine-point scheme of nonlinear diffusion equations
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The nine-point scheme (NPS) is a finite volume scheme for solving nonlinear diffusion equations on quadrilateral grids. It’s well-known that the solution of the scheme on distorted grids cannot preserve positivity when all given data are nonnegative. Here for the NPS of nonlinear diffusion problems we propose a conservative enforcing positivity algorithm (CEPA), which is posterior correction of the discrete solution, and allows the new solution preserves positivity as well as local conservation at each step of nonlinear iteration. Numerical results are presented to demonstrate that the accuracy of our algorithm of enforcing positivity with conservation is higher than some common procedures of positivity correction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volumes 223–224, 1 June 2012, Pages 161–172
Journal: Computer Methods in Applied Mechanics and Engineering - Volumes 223–224, 1 June 2012, Pages 161–172
نویسندگان
Yanzhong Yao, Guangwei Yuan,