Modeling Complex Turbulent Flows

✍ Scribed by Jerry N. Hefner (auth.), Manuel D. Salas, Jerry N. Hefner, Leonidas Sakell (eds.)

• Publisher: Springer Netherlands
• Year: 1999
• Tongue: English
• Leaves: 384
• Series: ICASE/LaRC Interdisciplinary Series in Science and Engineering 7
• Edition: 1
• Category: Library

✦ Synopsis

Turbulence modeling both addresses a fundamental problem in physics, 'the last great unsolved problem of classical physics,' and has far-reaching importance in the solution of difficult practical problems from aeronautical engineering to dynamic meteorology. However, the growth of supercom­ puter facilities has recently caused an apparent shift in the focus of tur­ bulence research from modeling to direct numerical simulation (DNS) and large eddy simulation (LES). This shift in emphasis comes at a time when claims are being made in the world around us that scientific analysis itself will shortly be transformed or replaced by a more powerful 'paradigm' based on massive computations and sophisticated visualization. Although this viewpoint has not lacked ar­ ticulate and influential advocates, these claims can at best only be judged premature. After all, as one computational researcher lamented, 'the com­ puter only does what I tell it to do, and not what I want it to do. ' In turbulence research, the initial speculation that computational meth­ ods would replace not only model-based computations but even experimen­ tal measurements, have not come close to fulfillment. It is becoming clear that computational methods and model development are equal partners in turbulence research: DNS and LES remain valuable tools for suggesting and validating models, while turbulence models continue to be the preferred tool for practical computations. We believed that a symposium which would reaffirm the practical and scientific importance of turbulence modeling was both necessary and timely.

✦ Table of Contents

Front Matter....Pages i-x
Current and Future Needs in Turbulence Modeling....Pages 1-3
Army Turbulence Modeling Needs....Pages 5-7
The Best Turbulence Models for Engineers....Pages 9-28
The Modeling of Turbulent Flows with Significant Curvature or Rotation....Pages 29-51
A Perspective on Turbulence Modeling....Pages 53-67
Developments in Structure-Based Turbulence Modeling....Pages 69-87
The Low Dimensional Approach to Turbulence....Pages 89-106
Modeling Non-Equilibrium Turbulent Flows....Pages 107-137
Development of Algebraic Reynolds Stress Model for Non-Equilibrium Turbulence....Pages 139-160
Toward a Vortex Method Simulation of Non-Equilibrium Turbulent Flows....Pages 161-181
Two-Point Closures and Statistical Equilibrium....Pages 183-202
Modeling the Turbulent Wall Flows Subjected to Strong Pressure Variations....Pages 203-222
Some Structural Features of Pressure-Driven Three-Dimensional Turbulent Boundary Layers from Experiments....Pages 223-243
Physics and Computations of Flows with Adverse Pressure Gradients....Pages 245-258
Computations of Complex Turbulent Flows Using the Commercial Code Fluent....Pages 259-276
Simulation of Shock Wave-Turbulent Boundary Layer Interactions Using the Reynolds-Averaged Navier-Stokes Equations....Pages 277-296
Some Results Relevant to Statistical Closures for Compressible Turbulence....Pages 297-327
Transport Coefficients in Rotating Weakly Compressible Turbulence....Pages 329-347
Development of A Turbulence Model for Flows with Rotation and Curvature....Pages 349-360
Modeling and Analysis of Turbulent Flows in the Presence of Rotation and Curvature....Pages 361-372
Back Matter....Pages 373-385

✦ Subjects

Mechanics;Meteorology/Climatology;Fluid- and Aerodynamics;Classical Continuum Physics