摘要:

AbstractEs werden Familien von Verfahren höherer Ordnung zur iterativen Einschließung der inversen Matrix betrachtet. Dafür werden Aussagen über die Konvergenz, die R‐Ordnung und die Monotonie der Verfahren bewiesen, die über das hinausgehen, was für Spezialfälle schon bek

ISSN:0044-2267    

DOI:10.1002/zamm.19890690302

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractWe present an analysis of the quantum Liouville equation under the assumption of a globally bounded potential energy. By using methods of semigroup theory we prove existence and uniqueness results. We also show the existence of the particle density. The last section is concerned with the classical limit. We show that the solutions of the quantum Liouville equation converge to the solution of the classical Liouville equation as the Planck constant h tends to zero.

ISSN:0044-2267    

DOI:10.1002/zamm.19890690303

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19890690306

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractA linearized solution has been obtained for a steady, non‐equilibrium, magnetogasdynamic flow of a conducting fluid with infinite conductivity over a wedge where the oncoming flow is assumed to be in a non‐equilibrium state and the uniform magnetic field is aligned to the uniform fluid stream in the undisturbed state. The effects due to viscosity, heat conduction and diffusion have been neglected. The solution reduces to the previous result of Vincenti [13] for non‐magnetic case as a special case. It further reduces to the previous result of Clarke [2]for an equilibrium free stream. The variations of the velocity disturbance along the initial frozen Mach line and the pressure coefficient as well as relaxation parameter on the surface of the wedge have been studied. The pressure coefficient becomes negative under certain condi

ISSN:0044-2267    

DOI:10.1002/zamm.19890690307

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19890690310

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractAn appropriate finite element model is developed for the simulation of mass and heat transfer in artificial fractures of deep hot dry rock masses involving fluid buoyancy and thermal rock contraction effects. The strongly nonlinear unsteady geothermal processes are solved by an implicit predictor‐corrector method with automatically adjusted time stepping and a full Newton approach. Alternative schemes are used for steady state problems. Computational examples are presented illustrating the effect of heat removal, density coupling and rock contraction. The results obtained are compared with previous findings and analytical solutions if exis

ISSN:0044-2267    

DOI:10.1002/zamm.19890690313

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19890690318

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractThe closed‐form weight function for an internal elliptical crack in an infinite body is derived and used to obtain stress intensity factor formulae for nine different loading configurations. For the special case where the elliptical crack has equal semi‐major and semi‐minor axes, i.e. an internal penny‐shaped crack, the weight function and stress intensity factor formulae obtained are identical to those given by Tada, Paris and Ir

ISSN:0044-2267    

DOI:10.1002/zamm.19890690319

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19890690320

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19890690321

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY