1st Edition

Numerical Techniques for Direct and Large-Eddy Simulations

By Xi Jiang, Choi-Hong Lai Copyright 2009
    276 Pages 65 B/W Illustrations
    by CRC Press

    282 Pages 65 B/W Illustrations
    by CRC Press

    Compared to the traditional modeling of computational fluid dynamics, direct numerical simulation (DNS) and large-eddy simulation (LES) provide a very detailed solution of the flow field by offering enhanced capability in predicting the unsteady features of the flow field. In many cases, DNS can obtain results that are impossible using any other means while LES can be employed as an advanced tool for practical applications. Focusing on the numerical needs arising from the applications of DNS and LES, Numerical Techniques for Direct and Large-Eddy Simulations covers basic techniques for DNS and LES that can be applied to practical problems of flow, turbulence, and combustion.

    After introducing Navier–Stokes equations and the methodologies of DNS and LES, the book discusses boundary conditions for DNS and LES, along with time integration methods. It then describes the numerical techniques used in the DNS of incompressible and compressible flows. The book also presents LES techniques for simulating incompressible and compressible flows. The final chapter explores current challenges in DNS and LES.

    Helping readers understand the vast amount of literature in the field, this book explains how to apply relevant numerical techniques for practical computational fluid dynamics simulations and implement these methods in fluid dynamics computer programs.


    Governing Equations: Compressible and Incompressible Formulations

    Turbulence and Direct Numerical Simulation (DNS)

    Large-Eddy Simulation (LES)

    Numerical Treatment of Boundary Conditions

    Inflow and Outflow Boundary Conditions

    Wall Boundary Conditions

    Other Boundary Conditions

    Discrete Time Integration Methods

    High-Order Runge–Kutta (RK) Methods

    Linear Multistep Methods: Adams–Bashforth and Adams–Moulton Methods

    Other Time Integration Methods

    DNS of Incompressible Flows

    Sample Results: DNS of Channel Flows

    Numerical Features: DNS of Incompressible Flows

    DNS of Compressible Flows

    Sample Results: DNS of Compressible Jet Flows

    Numerical Features: High-Order Schemes for Spatial Discretization

    LES of Incompressible Flows

    Sample Results: LES of Incompressible Flows in Complex Geometries

    Subgrid Scale Modeling of Incompressible Flows

    Numerical Features: LES on Unstructured Grids and Immersed Boundary Technique for Complex Geometries

    LES of Compressible Flows

    Sample Results of LES of Compressible Flows

    Subgrid-Scale Modeling of Compressible Flows and Implicit Large-Eddy Simulation (ILES)

    Further Topics and Challenges in DNS and LES

    Multiscale Flow Simulations

    Challenges in DNS and LES: Complex Geometry and SGS Modeling

    Hybridization: Detached Eddy Simulation (DES)

    Appendix: Supplementary Material: FORTRAN 90 Routines of the Finite Difference Schemes


    References appear at the end of each chapter.


    Xi Jiang is Senior Lecturer of Mechanical Engineering in the School of Engineering and Design at Brunel University.

    Choi-Hong Lai is Professor of Numerical Mathematics in the School of Computing and Mathematical Sciences at the University of Greenwich.

    The book can be recommended to CFD practitioners at the early stage of their academic career, such as postgraduate students and junior researchers, to understand the vast literature in the field and to apply the relevant numerical techniques.
    Zentralblatt MATH 1185