摘要:

AbstractThe application of the finite‐element method to the simulation of meterological fluid flow problems is reviewed. Early studies were aimed primarily at demonstrating the viability of the method for one‐ and two‐dimensional flows, whereas more recent studies have been aimed at demonstrating the efficiency and viability of the method for more complex three‐dimensional simulations. There has also been a shift towards exploiting such models to better understand and predict the underlying meteorological phenomena, rather than restricting attention to the development of the alg

ISSN:0271-2091    

DOI:10.1002/fld.1650040102

出版商:John Wiley&Sons, Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractA technique is presented for calculating the transient flow in high pressure transportation systems where both simple systems (without compressors) and systems with compressors have been taken into consideration. A partial differential equation characterizing the dynamic gas flow through a pipeline and a numerical scheme for its solution are considered. A method of computing node pressures is also characterized.

ISSN:0271-2091    

DOI:10.1002/fld.1650040103

出版商:John Wiley&Sons, Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractNumerical solutions to the Navier–Stokes equation may provide designers with predictions of the wind environment of buildings under design. To investigate this possibility, two complementary solution procedures are implemented for two‐dimensional geometry: a random vortex method to depict the flow evolution, and a control volume method to depict the steady flow field. These are both illustrated by specific application to the case of a building form with a roof of arbitrary pi

ISSN:0271-2091    

DOI:10.1002/fld.1650040104

出版商:John Wiley&Sons, Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractIn Part I of this paper we presented a mixed finite element method, for solving unsteady, incompressible, convective flows, based on assumed ‘deviatoric stress–velocity–pressure’ fields in each element, which have the features: (i) the convective term is treated by the usual Galerkin technique; (ii) the unknowns in the global system of finite element equations are the nodal velocities, and the ‘constant term’ in the arbitrary pressure field over each element; and (iii) exact integrations are performed over each element.In this paper we present numerical studies, both for steady as well as unsteady cases, of the problems: (a) the driven cavity, (b) Jeffry–Hamel flow in a channel, (c) flow over a ‘backward’ or ‘downstream’ facing step, and (d) flow over a square step. All these problems are two‐dimensional in nature, although certain 3‐D solutions are to be presented in a separate paper. The present results are compared with those which are available in the literature and are based on alternative approaches to treat incompressibility and convective acceleration. The possible merits of the present me

ISSN:0271-2091    

DOI:10.1002/fld.1650040105

出版商:John Wiley&Sons, Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractA finite element method for the analysis of nearshore current, which is one of the principal currents in coastal seas, is presented in this paper. Because the nearshore current is induced by the variable distribution of the surface waves, it is necessary to analyse two main characteristics of the wave, i.e. direction and height. The current can be computed using the resulting wave characteristics. The present method makes it possible to employ procedures for which the same methods of solution are applicable for all basic equations of wave direction, height and current flow. The linear interpolation function is used for the discretization of spatial variables and a selective lumping two step explicit scheme is employed for the numerical integration in time. The numerical solutions obtained are compared with analytical, experimental and observed ones. From these comparative studies, it is concluded that the present finite element method provide a useful tool for the analysis of nearshore current.

ISSN:0271-2091    

DOI:10.1002/fld.1650040106

出版商:John Wiley&Sons, Ltd    

年代:1984

数据来源: WILEY

ISSN:0271-2091    

DOI:10.1002/fld.1650040107

出版商:John Wiley&Sons, Ltd    

年代:1984

数据来源: WILEY

ISSN:0271-2091    

DOI:10.1002/fld.1650040109

出版商:John Wiley&Sons, Ltd    

年代:1984

数据来源: WILEY

ISSN:0271-2091    

DOI:10.1002/fld.1650040110

出版商:John Wiley&Sons, Ltd    

年代:1984

数据来源: WILEY

ISSN:0271-2091    

DOI:10.1002/fld.1650040101

出版商:John Wiley&Sons, Ltd    

年代:1984

数据来源: WILEY