OpenFOAM Workshop. Yağmur Gülkanat Res.Assist.

Transcription

1 OpenFOAM Workshop Yağmur Gülkanat Res.Assist.

2 Introduction to OpenFOAM

3 What is OpenFOAM? FOAM = Field Operation And Manipulation OpenFOAM is a free-to-use open-source numerical simulation software with extensive CFD and multi-physics capabilities Free-to-use means using the software without paying for license and support, including massively parallel computers: free CFD license! Toolbox for Computational Mechanics, primarily CFD Open-source, written in C++ Generic and programmable Solves of discrete partial differential eqns on unstructed grids Finite volume, finite element, lagrangian particle tracking, and more.. Introduction to OpenFOAM

4 Two development lines for OpenFOAM OpenCFD Ltd. (2004) acquired by SGI (2011) Led by Henry Weller openfoam.com Wikki Ltd. (2004) Led by Hrvoje Jasak Extend Project extend-project.de Introduction to OpenFOAM

5 History Late 1980 s: Imperial College, Prof. David Gosman s research group 1996: H. Jasak. PhD Thesis, Imperial College, University of London (1st PhD thesis on OF) : Nabla, Ltd, markets commercial product, FOAM 2004: Nabla makes OpenFOAM GPL 2004: OpenCFD, Ltd (Henry Weller) and Wikki, Ltd (Hrv Jasak) Jan 2006: 1st OpenFOAM Workshop Nov 2007: 1st OpenFOAM Conference (Open-source CFD Conference) 2009: FOAM Documentation Project was shut-down Aug 2011: SGI purchases OpenCFD, Ltd. Sep 2012: ESI Group purchases OpenCFD from SGI Introduction to OpenFOAM

6 Capabilities OpenFOAM is a CFD Toolbox written in C++ Software : Liberal use of C++ abstraction Run-time selection of libraries Five basic classes Libraries : Numerical algorithms and physical models Utilities: Meshing, pre-processing, parallel computing, postprocessing, etc. Solvers : Designed for specific classes of problems, e.g., incompressible flow, compressible flow, multiphase flow, etc. Introduction to OpenFOAM

7 File Structure Introduction to OpenFOAM

8 Applications = Solvers + Utilities Solvers For solving a specific continuum mechanics problem with a specific system of PDEs. Utilities For performing tasks that involve data handling and manipulation eg. CFD, Stress Analysis etc. eg. Meshing, case setup, solution monitoring, data export etc. Exploring the OpenFOAM environment

9 Location of applications source code Allwmake used to compile all the applications solvers contains the source code of the solvers utilities contains the source code of the utilities test contains the source code for testing specific features of OpenFOAM Exploring the OpenFOAM environment

10 Solvers in OpenFOAM

11 Solvers in OpenFOAM Exploring the OpenFOAM environment

12 Frequently Used Standart Solvers Exploring the OpenFOAM environment

13 Frequently Used Standart Solvers Exploring the OpenFOAM environment

14 Frequently Used Standart Solvers Exploring the OpenFOAM environment

15 icofoam Solver Exploring the OpenFOAM environment

16 Utilities in OpenFOAM

17 Utilities in OpenFOAM Exploring the OpenFOAM environment

18 Frequently Used Standart Utilities Exploring the OpenFOAM environment

19 Frequently Used Standart Utilities Exploring the OpenFOAM environment

20 Frequently Used Standart Utilities Exploring the OpenFOAM environment

21 Frequently Used Standart Utilities Exploring the OpenFOAM environment

22 A Simple Example

23 The Lid-driven Cavity Tutorial Problem Contents Overview: Description of the problem Part 1: Mesh Generation Part 2: Initial & Boundary Conditions Part 3: Setting Physical Properties Part 4: Solver Control 19

24 Overview: Description of the Problem 20

25 Overview: Description of the Problem 21

26 Part 1: Pre-processing 22

27 Part 1: Pre-processing 23

28 Part 1: Pre-processing 24

29 Part 1: Pre-processing Mesh Generation 25

30 Part 1: Pre-processing Mesh Generation 26

31 Part 1: Pre-processing Mesh Generation 27

32 Part 1: Pre-processing Mesh Generation 28

33 Part 1: Pre-processing Mesh Generation 29

34 Part 1: Pre-processing Mesh Generation 30

35 Part 1: Pre-processing Mesh Generation 31

36 Part 1: Pre-processing Mesh Generation 32

37 Part 1: Pre-processing Mesh Generation 33

38 Part 1: Pre-processing Mesh Generation 34

39 Part 1: Pre-processing Mesh Generation 35

40 Part 1: Pre-processing Mesh Generation 36

41 Part 2: Initial and Boundary Conditions 37

42 Dimensional Units 38

43 Part 2: Initial and Boundary Conditions 39

44 Part 2: Initial and Boundary Conditions 40

45 Part 3: Physical Properties 41

46 Part 4: Solver Controls 42

47 Part 4: Solver Controls 43

48 Part 4: Solver Controls - fvschemes 44

49 Numerical schemes 45

50 Interpolation schemes 46

51 Surface normal gradient schemes 47

52 Gradient schemes 48

53 Divergence schemes 49

54 Laplacian schemes 50

55 Time schemes 51

56 Part 4: Solver Controls - fvsolution 52

57 Linear solver control 53

58 Preconditioned conjugate gradient solvers 54

59 Smooth solvers 55

60 Smooth solvers 56

61 Part 5: Processing 57

62 Part 5: Post Processing 58

63 References OpenFOAM Documentation, Nilsson, H. (2009), PhD course in CFD with OpenSource software. David A. Boger (2011), Getting Started with OpenFOAM, 6th OpenFOAM Workshop User Forum ( Wiki ( References

64 Q & A