A Simplified Study of the Turbulent Free Shear Layer Between Two Dissimilar Gases

A Simplified Study of the Turbulent Free Shear Layer Between Two Dissimilar Gases

Author: K. Evan Gray

Publisher:

Published: 1965

Total Pages: 52

ISBN-13:

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An analytical study of the turbulent mixing of two dissimilar gases in a free shear layer was performed. A simplified method was designed by which closed form expressions could be obtained for the characteristics of such a flow. These included the boundaries of the mixing region, the location of the dividing streamline, the local flow velocities, the local thermodynamic conditions, and the mean rate of energy transport across the shear layer. Although the effects of compressibility and the presence of dissimilar gases on either side of the mixing region raise the level of complexity of the problem, the approach remains the same as that used to solve the single gas compressible problem. Therefore, in order to focus attention on this approach, the incompressible one-gas flow is treated first, then the modifications required to account for compressibility are shown and the results, which then become functions of Mach number and enthalpy, are given, and finally, the treatment and results for the mixing of two dissimilar gases are presented. (Author).


Analytical and Experimental Investigation of a Turbulent Mixing Layer of Different Gases in a Pressure Gradient

Analytical and Experimental Investigation of a Turbulent Mixing Layer of Different Gases in a Pressure Gradient

Author: Manuel Rebollo Rebollo

Publisher:

Published: 1973

Total Pages: 152

ISBN-13:

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An analytical and experimental study was made of the turbulent mixing layer in adverse and zero pressure radients. Theory predicts the possible existence of equilibrium flows, and this was confirmed experimentally for turbulent shear layers between streams of helium and nitrogen. The only case for which similarity is possible is described. The experimental investigation was conducted in a facility designed to produce turbulent flows at pressures up to 10 atmospheres. Adjustable walls of the test section of the apparatus were modified in order to set the pressure gradient. Shadowgraphs of the mixing zone for both types of gradient at different Reynolds numbers revealed a large scale structure noticeably different for each. The similarity properties of the shear layer were established from mean profiles of total head and density. (Modified author abstract).


Turbulent Shear Flows 5

Turbulent Shear Flows 5

Author: Franz Durst

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 367

ISBN-13: 3642714358

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The first four symposia in the series on turbulent shear flows have been held alternately in the United States and Europe with the first and third being held at universities in eastern and western States, respectively. Continuing this pattern, the Fifth Symposium on Turbulent Shear Flows was held at Cornell University, Ithaca, New York, in August 1985. The meeting brought together more than 250 participants from around the world to present the results of new research on turbulent shear flows. It also provided a forum for lively discussions on the implications (practical or academic) of some of the papers. Nearly 100 formal papers and about 20 shorter communications in open forums were presented. In all the areas covered, the meeting helped to underline the vitality of current research into turbulent shear flows whether in experimental, theoretical or numerical studies. The present volume contains 25 of the original symposium presentations. All have been further reviewed and edited and several have been considerably extended since their first presentation. The editors believe that the selection provides papers of archival value that, at the same time, give a representative statement of current research in the four areas covered by this book: - Homogeneous and Simple Flows - Free Flows - Wall Flows - Reacting Flows Each of these sections begins with an introductory article by a distinguished worker in the field.


Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports

Author:

Publisher:

Published: 1995

Total Pages: 602

ISBN-13:

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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.


Parallel Computational Fluid Dynamics '95

Parallel Computational Fluid Dynamics '95

Author: A. Ecer

Publisher: Elsevier

Published: 1996-01-25

Total Pages: 749

ISBN-13: 0080538444

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Parallel Computational Fluid Dynamics(CFD) is an internationally recognised fast-growing field. Since 1989, the number of participants attending Parallel CFD Conferences has doubled.In order to keep track of current global developments, the Parallel CFD Conference annually brings scientists together to discuss and report results on the utilization of parallel computing as a practical computational tool for solving complex fluid dynamic problems. This volume contains the results of research conducted during the past year.Subject areas covered include: novel parallel algorithms, parallel Euler and Navier-Stokes solvers, parallel Direct Simulation Monte Carlo method and parallel multigrid techniques. The content of the book also demonstrates that considerable effort is being made to utilize parallel computing to solve a variety of fluid dynamics problems in topics such as climate modeling, consultation, aerodynamics and in many other areas.Readers of this book will gain a valid insight into the exciting recent developments in Parallel CFD research.