Download or read book An Assumed deviatoric Stress velocity pressure Mixed Finite Element Method for Unsteady Convective Incompressible Viscous Flow written by Chien-Tung Yang and published by . This book was released on 1983 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1984 with total page 1278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Viscous Flow Applications written by Carlos A. Brebbia and published by Springer Science & Business Media. This book was released on 2013-03-12 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Boundary Element Method has now become a powerful tool of engineering analysis and is routinely applied for the solution of elastostatics and potential problems. More recently research has concentrated on solving a large variety of non-linear and time dependent applications and in particular the method has been developed for viscous fluid flow problems. This book presents the state of the art on the solution of viscous flow using boundary elements and discusses different current approaches which have been validated by numerical experiments. . Chapter 1 of the book presents a brief review of previous work on viscous flow simulation and in particular gives an up-to-date list of the most important BEM references in the field. Chapter 2 reviews the governing equations for general viscous flow, including compressibility. The authors present a compre hensive treatment of the different cases and their formulation in terms of boundary integral equations. This work has been the result of collaboration between Computational Mechanics Institute of Southampton and Massa chusetts Institute of Technology researchers. Chapter 3 describes the gen eralized formulation for unsteady viscous flow problems developed over many years at Georgia Institute of Technology. This formulation has been extensively applied to solve aer09ynamic problems.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1983-12 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1982 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Finite Elements in Fluids written by Richard H. Gallagher and published by John Wiley & Sons. This book was released on 1984 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Finite Element Handbook written by Hayrettin Kardestuncer and published by McGraw-Hill Companies. This book was released on 1987 with total page 1416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Meshless Local Petrov Galerkin MLPG Method written by Satya N. Atluri and published by Crest. This book was released on 2002 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1984 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Methods in Laminar and Turbulent Flow written by Cedric Taylor and published by . This book was released on 1983 with total page 1300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Good,No Highlights,No Markup,all pages are intact, Slight Shelfwear,may have the corners slightly dented, may have slight color changes/slightly damaged spine.
Download or read book Finite Element Methods for Incompressible Flow Problems written by Volker John and published by Springer. This book was released on 2016-10-27 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores finite element methods for incompressible flow problems: Stokes equations, stationary Navier-Stokes equations and time-dependent Navier-Stokes equations. It focuses on numerical analysis, but also discusses the practical use of these methods and includes numerical illustrations. It also provides a comprehensive overview of analytical results for turbulence models. The proofs are presented step by step, allowing readers to more easily understand the analytical techniques.
Download or read book Numerical Methods in Laminar and Turbulent Flow written by and published by . This book was released on 1983 with total page 1300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Finite Element Methods for Viscous Incompressible Flows written by Max D. Gunzburger and published by Elsevier. This book was released on 2012-12-02 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finite Element Methods for Viscous Incompressible Flows examines mathematical aspects of finite element methods for the approximate solution of incompressible flow problems. The principal goal is to present some of the important mathematical results that are relevant to practical computations. In so doing, useful algorithms are also discussed. Although rigorous results are stated, no detailed proofs are supplied; rather, the intention is to present these results so that they can serve as a guide for the selection and, in certain respects, the implementation of algorithms.
Download or read book Annual Review of Numerical Fluid Mechanics and Heat Transfer written by and published by . This book was released on 1987 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1984-07 with total page 1526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Efficient Finite Element Computation of Unsteady Incompressible Viscous Flows Using Pseudo second order Velocity Interpolation written by Fırat Oğuz Edis and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to construct and apply a computationally cost-effective Finite Element algorithm for the solution of the unsteady, incompressible Navier-Stokes equations on arbitrarily complex flow domains in two and threespace dimensions. Choice of the interpolation function for the finite element isone of the most important aspects affecting the accuracy and computational costof the resulting scheme. The use of equal order interpolation functions for velocityand pressure can be a source of instability. An example is the Q1Q1 element pair,which employs continuous bilinear interpolation functions for both velocity andpressure. This element pair does not satisfy the div-stability condition and isknown to cause oscillations primarily in the pressure field. However, it is widelyused with the aid of a proper stabilizing term or time integration scheme due to its computational efficiency. Element pairs, coupling piecewise first-order velocity element with piecewise first- order pressure element, and still satisfying the div-stability condition are given in literature for triangular and quadrilateral elements. The quadrilateral element air is also called a pseudo biquadratic velocity and bilinear pressure element (pQ2Q1). The triangular pair is called a P1isoP2/P1 pair in the literature but can also be called analogously to the quadrilateral element as a pP2P1 element. These element pairs satisfy the div-stability condition which is also known asthe 'Ladyzhenskaya-Babuska-Brezzi'(LBB) condition. Fulfilling this conditionensures that no spurious oscillations occur in the pressure field. Furthermore, employment of these elements, when compared to an equivalent first-order pair formulation, is expected to reduce the memory requirement and the CPU timedue to the fewer elements used in the solution of the Poisson equation for pres-sure. However, in spite of these advantages, there is no open literature available presenting computations obtained using the pQ2Q1 element pair and very few forthe pP2P1 elements, discussing the efficiency of the computations in detail andcomparing the results for accuracy. Therefore, the purpose of the present study is: l. to present example computations obtained with pQ2Ql, pP2P1 element pairs, 2. to address special problems arising from the use of these element pairs, 3. to give detailed computation time and storage comparisons. To fulfill these purposes, a finite element formulation based on pQ2Ql, pP2Pl,QlQ1 and PlP1 elements is presented for the computation of two and threedimensional laminar and turbulent unsteady incompressible viscous flows. For each one of these elements, the unsteady Navier-Stokes equations are solvedusing a finite element method, based on a fractional step approach with an ex-plicit time marching scheme. A streamwise upwinding technique is employed tostabilize the convective term for large element Reynolds numbers. For the so-lution of the Poisson equation for pressure, a preconditioned conjugate gradientmethod with an element-by-element technique is employed. The previous value of pressure is used to start the iterations at each time step. This leads to consider- able savings in CPU time compared to auxiliary potential function-based pressure formulations. An algebraic turbulence model, namely the Baldwin-Lomax is im- plemented for the solution of turbulent flows. A modification of the original pseudo-second-order element is realized to accurately represent a curved bound- ary of the domain. Test cases analyzed include the lid-driven cavity flow problem, the flow past an impulsively started circular cylinder at Reynolds numbers 40 and 3000, and turbulent flow over a flat plate at Reynolds number 2 x 10 , in two space di- mensions. In 3D, the lid-driven cavity flow problem at Reynolds number 1000 is analyzed. Results obtained using the pseudo-second-order velocity interpolation elements are compared in terms of accuracy and computational cost with the results obtained using equal-order interpolation pairs. Comparisons with other experimental and numerical data and empirical formula are presented. Results obtained with pP2Pl and pQ2Q1 elements are shown to be as accurate as the results obtained with equal order elements on the same velocity mesh. Comparison of computational efforts for 2D cases indicates CPU time savings up to 68 per cent in favor of the pseudo-second-order velocity interpolation elements. For 3D analyses, savings up to 54 per cent are observed. It is concluded that the use of the pseudo-second-order interpolation for velocity instead of first-order interpolation reduces the computational costs. This is due to the reduction in the size of the stiffness matrix for pressure. The reduction in the computational cost may primarily be in the memory or the CPU time requirements, depending on the programming preferences.
Download or read book Computer Modeling in Engineering Sciences written by and published by . This book was released on 2001 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
