摘要:

AbstractWe study the approximation of radial functions inIRN,N≥ 2, by means of Lagrange finite elements on arbitrary grids. As an application, error estimates are obtained for the finite‐element discretization of the radial Schrödinger equation. (AMS subject classification number: 65

ISSN:0749-159X    

DOI:10.1002/num.1690070102

出版商:John Wiley&Sons, Inc.    

年代:1991

数据来源: WILEY

摘要:

AbstractA spectral algorithm based on the influence matrix technique is desclibed for solving numerically the flow of incompressible viscous fluids. The algorithmic development is for both Newtonian and non‐Newtonian flows. To investigate the performance of the method several test problems are solved. Accurate results are obtained with relatively few degrees of freedo

ISSN:0749-159X    

DOI:10.1002/num.1690070103

出版商:John Wiley&Sons, Inc.    

年代:1991

数据来源: WILEY

摘要:

AbstractA mesh of prismatic or tetrahedral elements automatically generated from an initial triangular grid is used to integrate 3‐D flow equation in space. Many numerical comparisons between these two models have been performed. The results show that integration with tetrahedrons is as accurate as integration with prisms but much more efficient. The CPU time of solution with prismatic elements is about three times greater than that required employing tetrahedral element

ISSN:0749-159X    

DOI:10.1002/num.1690070104

出版商:John Wiley&Sons, Inc.    

年代:1991

数据来源: WILEY

摘要:

AbstractAnO(h6) method for the interpolation of harmonic functions in rectangular domains is described and analyzed, The method is based on an earlier cubic spline technique [N. Papamichael and J.R. Whiteman, BIT14, 452–459 (1974)], and makes use of recent results concerning thea posterioricorrection of interpolatory cubic spline

ISSN:0749-159X    

DOI:10.1002/num.1690070105

出版商:John Wiley&Sons, Inc.    

年代:1991

数据来源: WILEY

摘要:

AbstractSuperconvergence properties in theL2norm are derived for the recovered gradients of piecewise quadratic finite element approximations on triangular partitions for two‐dimensional elliptic problems and systems, including the case of linear elasticity. The analysis covers problems defined on polygonal domains, where the solutions have low regularity. The effects of numerical integration are treate

ISSN:0749-159X    

DOI:10.1002/num.1690070106

出版商:John Wiley&Sons, Inc.    

年代:1991

数据来源: WILEY

ISSN:0749-159X    

DOI:10.1002/num.1690070107

出版商:John Wiley&Sons, Inc.    

年代:1991

数据来源: WILEY

ISSN:0749-159X    

DOI:10.1002/num.1690070101

出版商:John Wiley&Sons, Inc.    

年代:1991

数据来源: WILEY