Analysis of Turbulent Flows with Computer Programs, 3rd Edition

Chapter 6

Transport-Equation Turbulence Models

Chapter Outline Head

6.1 Introduction

6.2 Two-Equation Models

6.2.1 k-ε Model

6.2.2 k-ω Model

6.2.3 SST Model

6.3 One-Equation Models

6.3.1 Bradshaw’s Model

6.3.2 Spalart-Allmaras Model

6.4 Stress-Transport Models

Problems

References

6.1 Introduction

While the zero-equation models discussed in Chapter 5 are useful and accurate for most boundary-layer flows, these models lack generality. For turbulent shear flows other than wall boundary-layers, they require different expressions for mixing length and eddy viscosities. For example, for a plane jet, round jet and plane wake l = 0.09δ, l = 0.07δ, l = 0.16δ, respectively, with δ denoting the shear layer thickness. Transport equation models have less ...