openfoam workshop - İtÜtraining.uhem.itu.edu.tr/files/belgeler/belgeler-dosya... · • openfoam...
TRANSCRIPT
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OpenFOAM Workshop
Yağmur Gülkanat
Res.Assist.
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Introduction to OpenFOAM
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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..
23.01.2014Introduction to OpenFOAM 2
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Two development lines for OpenFOAM
23.01.2014Introduction to OpenFOAM 3
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
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History
23.01.2014Introduction to OpenFOAM 4
• 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)
• 2000-2004: 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
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Capabilities
23.01.2014Introduction to OpenFOAM 5
• 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, post-
processing, etc.
Solvers : Designed for specific classes of problems, e.g.,
incompressible flow, compressible flow, multiphase flow, etc.
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File Structure
23.01.2014Introduction to OpenFOAM 6
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Applications = Solvers + Utilities
23.01.2014Exploring the OpenFOAM environment 7
eg. CFD, Stress Analysis etc. eg. Meshing, case setup, solution monitoring, data export etc.
Solvers
For solving a specific continuum mechanics problem with a specific
system of PDEs.
Utilities
For performing tasks that involve data handling and
manipulation
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Location of applications’ source code
23.01.2014Exploring the OpenFOAM environment 8
utilities
• contains the source code of the utilities
test
• contains the source code for testing specific features of OpenFOAM
solvers
• contains the source code of the solvers
Allwmake
• used to compile all the applications
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Solvers in OpenFOAM
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Solvers in OpenFOAM
23.01.2014Exploring the OpenFOAM environment 9
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Frequently Used Standart Solvers
23.01.2014Exploring the OpenFOAM environment 10
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Frequently Used Standart Solvers
23.01.2014Exploring the OpenFOAM environment 11
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Frequently Used Standart Solvers
23.01.2014Exploring the OpenFOAM environment 12
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icoFOAM Solver
23.01.2014Exploring the OpenFOAM environment 13
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Utilities in OpenFOAM
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Utilities in OpenFOAM
23.01.2014Exploring the OpenFOAM environment 14
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Frequently Used Standart Utilities
23.01.2014Exploring the OpenFOAM environment 15
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Frequently Used Standart Utilities
23.01.2014Exploring the OpenFOAM environment 16
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Frequently Used Standart Utilities
23.01.2014Exploring the OpenFOAM environment 17
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Frequently Used Standart Utilities
23.01.2014Exploring the OpenFOAM environment 18
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A Simple Example
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The Lid-driven Cavity Tutorial
23.01.2014A Simple Example 19
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
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Overview: Description of the Problem
23.01.2014A Simple Example 20
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Overview: Description of the Problem
23.01.2014A Simple Example 21
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Part 1: Pre-processing
23.01.2014A Simple Example 22
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Part 1: Pre-processing
23.01.2014A Simple Example 23
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Part 1: Pre-processing
23.01.2014A Simple Example 24
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Part 1: Pre-processing – Mesh Generation
23.01.2014A Simple Example 25
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Part 1: Pre-processing – Mesh Generation
23.01.2014A Simple Example 26
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Part 1: Pre-processing – Mesh Generation
23.01.2014A Simple Example 27
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Part 1: Pre-processing – Mesh Generation
23.01.2014A Simple Example 28
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Part 1: Pre-processing – Mesh Generation
23.01.2014A Simple Example 29
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Part 1: Pre-processing – Mesh Generation
23.01.2014A Simple Example 30
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Part 1: Pre-processing – Mesh Generation
23.01.2014A Simple Example 31
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Part 1: Pre-processing – Mesh Generation
23.01.2014A Simple Example 32
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Part 1: Pre-processing – Mesh Generation
23.01.2014A Simple Example 33
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Part 1: Pre-processing – Mesh Generation
23.01.2014A Simple Example 34
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Part 1: Pre-processing – Mesh Generation
23.01.2014A Simple Example 35
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Part 1: Pre-processing – Mesh Generation
23.01.2014A Simple Example 36
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Part 2: Initial and Boundary Conditions
23.01.2014A Simple Example 37
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Dimensional Units
23.01.2014A Simple Example 38
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Part 2: Initial and Boundary Conditions
23.01.2014A Simple Example 39
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Part 2: Initial and Boundary Conditions
23.01.2014A Simple Example 40
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Part 3: Physical Properties
23.01.2014A Simple Example 41
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Part 4: Solver Controls
23.01.2014A Simple Example 42
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Part 4: Solver Controls
23.01.2014A Simple Example 43
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Part 4: Solver Controls - fvSchemes
23.01.2014A Simple Example 44
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Numerical schemes
23.01.2014A Simple Example 45
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Interpolation schemes
23.01.2014A Simple Example 46
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Surface normal gradient schemes
23.01.2014A Simple Example 47
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Gradient schemes
23.01.2014A Simple Example 48
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Divergence schemes
23.01.2014A Simple Example 49
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Laplacian schemes
23.01.2014A Simple Example 50
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Time schemes
23.01.2014A Simple Example 51
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Part 4: Solver Controls - fvSolution
23.01.2014A Simple Example 52
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Linear solver control
23.01.2014A Simple Example 53
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Preconditioned conjugate gradient solvers
23.01.2014A Simple Example 54
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Smooth solvers
23.01.2014A Simple Example 55
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Smooth solvers
23.01.2014A Simple Example 56
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Part 5: Processing
23.01.2014A Simple Example 57
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Part 5: Post Processing
23.01.2014A Simple Example 58
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References
23.01.2014References 59
• OpenFOAM® Documentation, http://www.openfoam.org/docs/
• Nilsson, H. (2009), http://www.tfd.chalmers.se/~hani/kurser/OS_CFD_2009
PhD course in CFD with OpenSource software.
• David A. Boger (2011), Getting Started with OpenFOAM ®,
6th OpenFOAM Workshop
• User Forum (http://www.cfd-online.com/Forum/)
• Wiki (http://openfoamwiki.net)
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Q & A