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王文洽
高等学校计算数学学报,2005,27(1):28~33,-0001,():
-1年11月30日
A modified alternating group methods of four points for solving the convection-diffusion equation is presented here. The method is not only unconditionally stable but also has the advantages of parallel computing. Numerical experiments show that the method is of high accuracy.
convection-diffusion equation,, group scheme of four points,, unconditionally stable,, parallel computing.,
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【期刊论文】NUMERICAL SIMULATION OF OIL MIGRATION-ACCUMULATION OF MUL TILAYER AND ITS APPLICATION X
王文洽, YUAN Yi-rang, ZHAO Wei-dong, CHENG Ai-jie, WANG Wen-qia, HAN Yu-ji
Applied Mathematics and Mechanics, 2002, 23 (8): 931-941,-0001,():
-1年11月30日
From such actual conditions as the effects of fluid mechanics in porous media and three- dimensional geology characteristics, the mathematical model and a kind of modified method of second order splitting-up implicit iterative scheme were put forward. For the actual problem of Dongying hollow (single layer) and Huimin hollow (multilayer) of Shengli Petroleum Oil Field, this numerical simulation test and the actual conditions are basically coincident, thus the well-known problem has been solved.
multilayer, migration-accumulation, Dongying hollow, Huimin hollow, numerical simulation
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【期刊论文】A CLASS OF AL TERNATING GROUP METHOD OF BURGERS’EQUATION X
王文洽
Allied Mathematics and Mechanics, 2004, 25 (2): 236-444,-0001,():
-1年11月30日
Some new Saul'yev type asymmetric difference schemes for Burgers'equation is given, by the use of the schemes, a kind of alternating group four points method for solving nonlinear Burgers'equation is constructed here. The basic idea of the method is that the grid points on the same time level is divided into a number of groups, the difference equations of each group can be solved independently, hence the method with intrinsic parallelism can be used directly on parallel computer. The method is unconditionally stable by analysis of linearization procedure. The numerical experiments show that the method has good stability and accuracy.
Burgers', equation, Saul', yev type asymmetric difference scheme, alternating group four points scheme, linear unconditional stability, parallel computation
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王文洽, WANG Wen-qia
Allied Mathematics and Mechanics, 2003, 24 (1): 32-42,-0001,():
-1年11月30日
A new discrete approximation to the convection term of the covection-diffusion equation was constructed in Saul'yev type difference scheme, then the alternating segment Crank-Nicolson (ASC-N) method for solving the convection- diffusion equation with variable coefficient was developed. The ASC-N method is unconditionally stable. Numerical experiment shows that this method has the obvious property of parallelism and accuracy. The method can be used directly on parallel computers.
convection- diffusion equation, alternating segment method, Crank-Nicolson scheme, asymmetries difference scheme, unconditionally stable, parallel computing
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66浏览
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王文洽
计算数学,2005,27(2):129~140,-0001,():
-1年11月30日
本文给出了一组逼近色散方程的非对称差分格式,并用这组格式和对称的Crank-Nicolson型格式构造了求解色散方程的并行交替分段差分隐格式。这个格式是无条件稳定的,能直接在并行计算机上使用。数值试验表明,这个格式有很好的精度。
色散方程,, 非对称差分格式,, 交替分段差分格式,, 绝对稳定,, 并行计算
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50浏览
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