Introduction to Computational Fluid Dynamics
Target group
Members of the Doctoral School of (Bioscience) Engineering
Level
All PhD students
Content
The course discusses the numerical methods and the turbulence models as implemented in the commercial package Fluent. There is intensive training with the package. The course does not treat methods for development of algorithms and models. There is no programming involved.
The course follows the book “An Introduction to Computational Fluid Dynamics: The Finite Volume Method” of H.K. Versteeg and W. Malalasekera (V&M), Pearson Education Limited, Second Edition, 2007. The book can be obtained from a bookshop or from internet, but purchase of the book is not necessary. The methods and the models are described in condensed form in the user’s guide of the package Fluent. In addition, short course notes are distributed by the lecturers.
Lecturers
Prof Dr Ir Joris Degroote, Prof Dr Ir Bart Merci and researchers from their teams
Programme
Course week: 1923 September 2016
Monday 19 September 2016 

09:0010:15  Lecture 1: Grids and spatial discretisation (Chapter 11 V&M) Body fitted grids, block structured grids, unstructured grids, cellcentred and vertexbased finite volume formulations 
10:3011:45 
Lecture 2: Equations + Transport mechanisms (Chapter 2 V&M) 
13:0014:15  Lecture 3: Equations + Transport mechanisms (Continued) 
14:3017:15 
Exercises 1+2: Introduction to Ansys Fluent and WorkBench Drawing, meshing, boundary conditions and settings

Tuesday 20 September 2016 

09:0010:15  Lecture 4: Finite volume methods for diffusion problems and convectiondiffusion problems (Chapter 4 and first part of Chapter 5 V&M) Onedimensional steady diffusion, twodimensional steady diffusion, onedimensional steady convectiondiffusion, central differencing, upwind differencing, hybrid differencing, twodimensional steady convectiondiffusion 
10:3011:45  Lecture 5: Higherorder differencing for convectiondominated convectiondiffusion (Par 5.9 and 5.10 V&M) Quadratic upwind differencing, stability problems of higher order differences, TVDschemes 
13:0014:15  Lecture 6: Solution of discretised equations (Chapter 7 V&M) Tridiagonal matrix algorithm, linebyline iteration in two and three dimensions, pointiterative methods, acceleration by multigrid techniques 
14:3017:15 
Exercises 3+4: Thermal problem Numerical diffusion, grid alignment and grid convergence 
Wednesday 21 September 2016 

09:0011:45  Lectures 7+8: Turbulence modelling (Chapter 3 V&M) Transition and turbulence, descriptors of turbulent flows, free turbulent flows, boundary layer flows, Reynoldsaveraged NavierStokes equations, eddy viscosity and eddy diffusivity, standard kε model, wall functions, wall damping. Introduction to advanced RANS turbulence models: RSM, RNG kε, kω, SST, ASM, NLEVM. Introduction to LES and DNS 
13:0017:15  Exercises 5+6+7: Backward facing step Laminar and turbulent flow, choice of turbulence model and wall treatment 
Thursday 22 September 2016 

09:0011:45  Lectures 9+10: Pressurevelocity coupling (Chapter 6 V&M) Risk for pressure oscillations. Pressurevelocity coupling in a convective system. Momentum interpolation, SIMPLEalgorithm 
13:0017:15 
Exercises 8+9+10: Steady supersonic flow over an airfoil Adaptive refinement, separation prediction 
Friday 23 September 2016 

09:0011:45  Lectures 11+12: Unsteady flows of compressible and incompressible fluids (Chapter 8 V&M) Explicit, implicit and semiimplicit time stepping 
13:0015:45 
Exercises 11+12: Pressure waved in a tank Transient flows with density based stepping methods, subcritical and supercritical, implicit and explicit time integration, time step size selection 
Venue
Lectures: Ghent University, Department of Flow, Heat and Combustion Mechanics, SintPietersnieuwstraat 41, Technicum Building 4, 3rd floor, lecture room 3.1 Stromingstechniek)
Exercises: Ghent University, Faculty of Engineering and Architecture, Jozef Plateaustraat 22, Plateau, PC room B
Language
English
Participants
Maximum 25 participants are allowed
Registration fee
Free of charge for members of the Doctoral Schools
Registration procedure
Registration by email to Prof. Degroote (please mention your student nr): Joris.Degroote@UGent.be
Evaluation criteria (doctoral training programme)
Presence + practical exercises during the course week