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1. |
Generalized integral transform solution for boundary layer flow over a sphere |
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International Journal for Numerical Methods in Fluids,
Volume 18,
Issue 8,
1994,
Page 721-731
P. L. C. Lage,
R. H. Rangel,
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摘要:
AbstractThe generalized integral transform technique is applied to the boundary layer equations for flow over a sphere in their primitive variables. Even though a diffusion‐based eigenvalue problem is used, the velocity profile, shear stress and separation point have been calculated with high accuracy. Low‐order approximations are shown to be accurate near the surface and the predictions of the separation point is very good. Comparison with finite difference results shows the better convergence behaviour of the integral transform met
ISSN:0271-2091
DOI:10.1002/fld.1650180802
出版商:John Wiley&Sons, Ltd
年代:1994
数据来源: WILEY
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2. |
Finite volume methods for laminar and turbulent flows using a penalty function approach |
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International Journal for Numerical Methods in Fluids,
Volume 18,
Issue 8,
1994,
Page 733-746
J. Simoneau,
A. Pollard,
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摘要:
AbstractA penalty function, finite volume method is described for two‐dimensional laminar and turbulent flows. Turbulence is modelled using thek‐ϵ model. The governing equations are discretized and the resulting algebraic equations are solved using both sequential and coupled methods. The performance of these methods is gauged with reference to a tuned SIMPLE‐C algorithm. Flows considered are a square cavity with a sliding top, a plane channel flow, a plane jet impingement and a plane channel with a sudden expansion. A sequential method is employed, which uses a variety of dicretization practices, but is found to be extremely slow to converge; a coupled method, evaluated using a variety of matrix solvers, converges rapidly but, relative to the sequential approach, requires larger
ISSN:0271-2091
DOI:10.1002/fld.1650180803
出版商:John Wiley&Sons, Ltd
年代:1994
数据来源: WILEY
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3. |
Adaptive panel methods and their integration with CAD |
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International Journal for Numerical Methods in Fluids,
Volume 18,
Issue 8,
1994,
Page 747-760
Tim David,
Robert Lewis,
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摘要:
AbstractThe work outlined below presents simple but effective adaptive meshing algorithms for boundary integral methods modelling inviscid flows (panel method) using the IGES standard for describing geometry. By using certain IGES entities in describing the boundary, CAD‐derived geometry may be used such that the geometric integrity of the boundary is maintained after an adaptive redistribution of the mesh. Three types of error estimators are tested and all are shown to produce a more accurate representation of the flow phenomena for the same number of panels as compared with a uniform mesh distributio
ISSN:0271-2091
DOI:10.1002/fld.1650180804
出版商:John Wiley&Sons, Ltd
年代:1994
数据来源: WILEY
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4. |
An algebraic multigrid solver for Navier‐Stokes problems |
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International Journal for Numerical Methods in Fluids,
Volume 18,
Issue 8,
1994,
Page 761-780
R. Webster,
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摘要:
AbstractAn efficient numerical method is presented for solving the equations of motion for viscous fluids. The equations are discretized on the basis of unstructured finite element meshes and then solved by direct iteration. Advective fluxes are temporarily fixed at each iteration to provide a linearized set of coupled equations which are then also solved by iteration using a fully implicit algebraic multigrid (AMG) scheme. A rapid convergence to machine accuracy is achieved that is almost mesh‐independent. The scaling of computing time with mesh size is therefore close to the optimu
ISSN:0271-2091
DOI:10.1002/fld.1650180805
出版商:John Wiley&Sons, Ltd
年代:1994
数据来源: WILEY
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5. |
Chebyshev collocation method and multidomain decomposition for the incompressible Navier‐Stokes equations |
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International Journal for Numerical Methods in Fluids,
Volume 18,
Issue 8,
1994,
Page 781-799
A. Pinelli,
A. Vacca,
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摘要:
AbstractThe two‐dimensional incompressible Navier‐Stokes equations in primitive variables have been solved by a pseudospectral Chebyshev method using a semi‐implicit fractional step scheme. The latter has been adapted to the particular features of spectral collocation methods to develop the monodomain algorithm. In particular, pressure and velocity collocated on the same nodes are sought in a polynomial space of the same order; the cascade of scalar elliptic problems arising after the spatial collocation is solved using finite difference preconditioning. With the present procedure spurious pressure modes do not pollute the pressure field.As a natural development of the present work a multidomain extent was devised and tested. The original domain is divided into a union of patching sub‐rectangles. Each scalar problem obtained after spatial collocation is solved by iterating by subdomains. For steady problems aC1solution is recovered at the interfaces upon convergence, ensuring a spectrally accurate solution.A number of test cases have been solved to validate the algorithm in both its single‐block and multidomain configurations.The preliminary results achieved indicate that collocation methods in multidomain configurations might become a viable alternative to the spectral element technique for accurate flow p
ISSN:0271-2091
DOI:10.1002/fld.1650180806
出版商:John Wiley&Sons, Ltd
年代:1994
数据来源: WILEY
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6. |
Conference diary |
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International Journal for Numerical Methods in Fluids,
Volume 18,
Issue 8,
1994,
Page 801-802
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ISSN:0271-2091
DOI:10.1002/fld.1650180807
出版商:John Wiley&Sons, Ltd
年代:1994
数据来源: WILEY
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7. |
Masthead |
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International Journal for Numerical Methods in Fluids,
Volume 18,
Issue 8,
1994,
Page -
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PDF (108KB)
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ISSN:0271-2091
DOI:10.1002/fld.1650180801
出版商:John Wiley&Sons, Ltd
年代:1994
数据来源: WILEY
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