Computation Of Incompressible Three Dimensional Turbulent Boundary Layers And Comparison With Experiment PDF Download
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Author | : National Aeronautics and Space Administration (NASA) |
Publisher | : Createspace Independent Publishing Platform |
Total Pages | : 32 |
Release | : 2018-08-13 |
Genre | : |
ISBN | : 9781725140189 |
Download Computation of Incompressible, Three-Dimensional Turbulent Boundary Layers and Comparison with Experiment Book in PDF, ePub and Kindle
Incompressible three dimensional, turbulent boundary layer (3DTBL) experiments were simulated numerically by integrating the boundary layer equations together with an algebraic eddy viscosity turbulence model. For the flow treated, the downstream portion, where the crossflow was large, was not predicted with the present computational method; the flow was significantly influenced by elliptic flow field effects. Departures from the boundary layer concept are indicated. Calculations agreed reasonably well with the mean flow development up to separation. In one experiment the normal pressure gradients were found to be neligible in regions with large skewing and allowed testing turbulence models using the boundary layer equations. The simulation of this flow compared favorably with the experimental data throughout the flow field and suggested the applicability of algebraic eddy viscosity models for 3DTBLs. Mueller, U. R. Ames Research Center NASA-TM-84230, A-8873, NAS 1.15:84230 ...
Author | : |
Publisher | : |
Total Pages | : 32 |
Release | : 1982 |
Genre | : |
ISBN | : |
Download Computation of Incompressible, Three-dimensional Turbulent Boundary Layers and Comparison with Experiment Book in PDF, ePub and Kindle
Author | : Tuncer Cebeci |
Publisher | : Springer |
Total Pages | : 502 |
Release | : 2009-09-02 |
Genre | : Science |
ISBN | : 9783540807315 |
Download Modeling and Computation of Boundary-Layer Flows Book in PDF, ePub and Kindle
This second edition of the book, Modeling and Computation of Boundary-Layer Flows^ extends the topic to include compressible flows. This implies the inclusion of the energy equation and non-constant fluid properties in the continuity and momentum equations. The necessary additions are included in new chapters, leaving the first nine chapters to serve as an introduction to incompressible flows and, therefore, as a platform for the extension. This part of the book can be used for a one semester course as described below. Improvements to the incompressible flows portion of the book include the removal of listings of computer programs and their description, and their incor poration in two CD-ROMs. A listing of the topics incorporated in the CD-ROM is provided before the index. In Chapter 7 there is a more extended discussion of initial conditions for three-dimensional flows, application of the characteristic box to a model problem and discussion of flow separation in three-dimensional laminar flows. There are also changes to Chapter 8, which now includes new sections on Tollmien-Schlichting and cross-flow instabilities and on the predic tion of transition with parabolised stability equations, and Chapter 9 provides a description of the rational behind interactive boundary-layer procedures.
Author | : Ivanka Pelivan |
Publisher | : |
Total Pages | : 308 |
Release | : 2002 |
Genre | : |
ISBN | : |
Download Computation and Experiment in a Cross-flow Driven Three-dimensional Turbulent Boundary Layer Book in PDF, ePub and Kindle
Author | : Tuncer Cebeci |
Publisher | : |
Total Pages | : 98 |
Release | : 1977 |
Genre | : Airplanes |
ISBN | : |
Download A General Method for Calculating Three-dimensional Compressible Laminar and Turbulent Boundary Layers on Arbitrary Wings Book in PDF, ePub and Kindle
Author | : P. A. Krogstad |
Publisher | : |
Total Pages | : 60 |
Release | : 1982 |
Genre | : Turbulent boundary layer |
ISBN | : |
Download Calculations of Three-dimensional Turbulent Boundary Layers Using the Crank-Nicolson Method Book in PDF, ePub and Kindle
This report describes the results of the three-dimensional turbulent boundary-layer calculations performed for the Eurovisc Workshop held in Berlin on 1 April 1982. It is shown that the present method, based on the Crank-Nicolson finite-difference scheme and a simple eddy-viscosity model for turbulence, yields satisfactory results provided regions of viscous-inviscid interaction, which were present in at least three of the four test cases, are avoided. (Author).
Author | : Kua C. Chang |
Publisher | : |
Total Pages | : 220 |
Release | : 1975 |
Genre | : Boundary layer |
ISBN | : |
Download Calculation of Three-dimensional Boundary Layers on Ship Forms Book in PDF, ePub and Kindle
An implicit finite difference technique, in curvilin ear-orthogonal surface coordinates, has been developed for the solution of the differential equations of three-dimensional laminar and turbulent boundary layers on ship forms. For turbulent flow, a two-layer eddy-viscosity model has been employed as the closure model. The initial and boundary conditions required to solve the equations and the stability and accuracy of the numerical method are discussed at some length. Two mathematically-defined simple three-dimensional ship forms are studied in some detail. These are a tri-axial ellipsoid and a double elliptic ship.
Author | : Tuncer Cebeci |
Publisher | : |
Total Pages | : 37 |
Release | : 1974 |
Genre | : |
ISBN | : |
Download A General Method for Calculating Three-Dimensional Incompressible Laminar and Turbulent Boundary Layers. II. Three-Dimensional Flows in Cartesian Coordinates Book in PDF, ePub and Kindle
The report presents a general method for computing three-dimensional laminar and boundary-layer flows in Cartesian coordinates. In the equations, the Reynolds shear stress terms are modeled by an eddy-viscosity formulation developed by the author. A very efficient two-point finite-difference method was used to solve the governing equations. The accuracy of the method is investigated for laminar and turbulent flows. (Author).
Author | : Gerald Peter Francis |
Publisher | : |
Total Pages | : 372 |
Release | : 1965 |
Genre | : Boundary layer |
ISBN | : |
Download Incompressible Flow of the Three-dimensional Turbulent Boundary Layer on the Floor of Curved Channels Book in PDF, ePub and Kindle
Author | : Felix J. Pierce |
Publisher | : |
Total Pages | : 144 |
Release | : 1971 |
Genre | : Boundary value problems |
ISBN | : |
Download An Implicit Numerical Solution of the Turbulent Three-dimensional Incompressible Boundary-layer Equations Book in PDF, ePub and Kindle
A method of solving the three-dimensional, incompressible turbulent boundary-layer equations was developed using a Crank-Nicholson implicit finite-difference technique, with the turbulent stress terms modeled with an eddy-viscosity model obtained from mixing length theory. The method was applied to two three-dimensional flow geometries for which experimental data exists and a comparison with this data showed excellent agreement. A complete computer program was sufficiently generalized for application to two-dimensional laminar and turbulent flows with arbitrary pressure gradients. The method was applied to several such test cases and the solutions agreed well with both theory and experiment. An analysis was presented to determine the conditions for which the finite difference equations were stable and convergent. (Author).