Download or read book A Practical Adaptive grid Method for Complex Fluid flow Problems written by and published by . This book was released on 1984 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adaptive Grid Techniques for Elliptic Fluid flow Problems written by Steven Charles Caruso and published by . This book was released on 1985 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: The adaptive grid techniques are described for elliptic fluid flow problems. The method is an extension of a local refinement technique developed by Berger for systems of hyperbolic equations. Local refined grids are overlaid on a coarser base grid. Recursive use of this technique allows an arbitrary degree of grid refinement. Two classes of elliptic flows are identified; they are characterized as having strong or weak viscous inviscid interactions. Adaptive solution strategies, active and passive, respectively, are developed for each class. The SIMPLER method is used to solve the steady, laminar, incompressible Navier Stokes equations. Central differencing of the convective terms is implemented with the defect-correction method to stabilize the solution method for all cell Reynolds numbers. Uniform grid calculations are performed for the laminar backstep flow. Richardson estimated solution and truncation errors are compared to accurate estimates of the same quantities for the backstep flow. The solution error is well predicted. The truncation error estimates are less accurate, but the reliably indicate where grid refinement is required. Active adaptive calculations of the backstep are made, using boundary aligned refinement.

Download or read book A Time accurate Adaptive Grid Method and the Numerical Simulation of a Shock vortex Interaction written by Michael J. Bockelie and published by . This book was released on 1990 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adaptive grid Methods for Unsteady Problems in Fluid Mechanics written by Eric Charles Adams and published by . This book was released on 1994 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Approach for Dynamic Grids written by John W. Slater and published by . This book was released on 1994 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computational Modeling for Fluid Flow and Interfacial Transport written by Wei Shyy and published by Courier Corporation. This book was released on 2006-10-06 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: Practical applications and examples highlight this treatment of computational modeling for handling complex flowfields. It also functions as a text for learning essential computation elements. 1994 edition.

Download or read book Three dimensional Self adaptive Grid Method for Complex Flows written by and published by . This book was released on 1988 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adaptive Local Grid Refinement in Computational Fluid Mechanics written by Richard E. Ewing and published by . This book was released on 1987 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several promising new techniques for efficient and accurate numerical solution of large-scale fluid flow problems have been developed. These methods include self-adaptive mesh modification techniques for applications requiring front-tracking and local grid refinement as well as new preconditioning ideas for efficient implementation. Properties of systems of hyperbolic conservation laws have been obtained which will aid in development of accurate front-tracking algorithms. Adaptive grid refinement techniques developed include moving grid methods, local, fixed refinement involving linked-list data structures, and certain local patch refinement ideas which have great potential for ease of implementation in existing large scale codes. Domain decomposition concepts for obtaining efficient preconditioners for iterative techniques have proved quite useful both for local patch refinement and for the solution of problems with rapidly varying coefficients. The fast adaptive algorithms being developed have high potential for both parallelization and vectorization. The algorithms have been designed to take advantage of the emerging parallel and vector-oriented computer architectures. Finally, the incorporation of these fast algorithms in accurate finite element, collocation, and finite difference methods is underway.

Download or read book An Adaptive Grid Technique for Solution of the Euler Equations written by Dun Charles Liu and published by . This book was released on 1987 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of Adaptive Grids in Solving the Partial Differential Equations Governing Fluid Flow written by D. A. Anderson and published by . This book was released on 1984 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A brief review of the goals and progress of the research on adaptive grid generation is presented. The principal results of the research are given by four papers supported by Grant AFOSR-83-0167 which comprise the appendix: Adaptive Grid Methods for Partial Differential Equations from Advances on Grid Generation, and AIAA papers 84-1608, 84-1610, and 84-1668. Keywords: Grid generation; Adaptive grids; Multidimensional; Finite difference methods.

Download or read book Adaptive Mesh Techniques for Unsteady Multi gradient Problems in Computational Fluid Dynamics written by Timothy James Bartel and published by . This book was released on 1987 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of a Self adaptive Grid Method to Complex Flows written by and published by . This book was released on 1989 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solving Fluid Flow Problems on Moving and Adaptive Overlapping Grids written by W. Henshaw and published by . This book was released on 2005 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solution of fluid dynamics problems on overlapping grids will be discussed. An overlapping grid consists of a set of structured component grids that cover a domain and overlap where they meet. Overlapping grids provide an effective approach for developing efficient and accurate approximations for complex, possibly moving geometry. Topics to be addressed include the reactive Euler equations, the incompressible Navier-Stokes equations and elliptic equations solved with a multigrid algorithm. Recent developments coupling moving grids and adaptive mesh refinement and preliminary parallel results will also be presented.

Download or read book Adaptive Grid Generation for Numerical Solution of Partial Differential Equations written by K. G. Brown and published by . This book was released on 1983 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new approach for the generation of flow-adaptive grids for numerical solution of fluid dynamics problems is presented. However, the method is applicable to the numerical evaluation of any partial differential equation. The dynamic coupling of the grid with the flow solution is accomplished through a grid-optimization technique. The optimization is based on the minimization of the finite difference truncation error in the transformed plane. The method is tested on the one-dimensional Burgers' equation which is representative of typical fluid dynamics problems. Burgers' equation is solved with an optimized SOR (Successive Over Relaxation) method using upwind difference for the convective term. Results are presented for various Reynolds numbers and are compared to results from a similar adaptive grid method and to results for a static grid. They show the ability of the method to concentrate grid points high in gradient regions where large truncation errors occur. (Author).

Download or read book Solution Adaptive Grid Generation for Fluid Flow Calculations Using the Discrete Variational Method written by Erik Martin Pedersen and published by . This book was released on 1992 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of Adaptive Grids to Fluid flow Problems with Asymptotic Solutions written by and published by . This book was released on 1980 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamic Grid Adaption Using the LPE Equation written by Christopher Randle Bennett and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the development and implementation of a dynamic adaptive grid method for general two and three dimensional static and transient fluid flow problems solved over structured grids. The technique automatically manipulates the location of grid points within the domain of interest to concentrate cells in regions of high solution activity, thus aiming to improve the accuracy of the overall simulation for a given number of initial grid cells. To achieve this aim the Laplace Poisson Equidistribution equation is used. Furthermore, the work also covers different types and treatment of weight functions needed to represent areas of high solution activity and a range of techniques necessary to make the use of adaptive grids practical, including geometry modelling and grid quality control. The technique is implemented on simple functions and within the commercial CFD code PHOENICS, on fluid flow problems ranging from convection driven flows to shock capturing. The ability of the technique to be used for general grid manipulation is demonstrated by using it to couple PHOENICS with a stress code in the simulation of a deflecting beam in a uniform flow. In addition, a novel technique to adapt grids to solution phenomena using neural nets is demonstrated.