OpenFOAM: User guide

Contents

1 Einleitung

2 Tutorials

2.1 Lid-driven cavity flow

2.1.1 Pre-processing

2.1.2 Viewing the mesh

2.1.3 Running an application

2.1.4 Post-processing

2.1.5 Increasing the mesh resolution

2.1.6 Introducing mesh grading

2.1.7 Increasing the Reynolds number

2.1.8 High Reynolds number flow

2.1.9 Changing the case geometry

2.1.10 Post-processing the modified geometry

2.2 Stress analysis of a plate with a hole

2.2.1 Mesh generation

2.2.2 Running the code

2.2.3 Post-processing

2.2.4 Exercises

2.3 Breaking of a dam

2.3.1 Mesh generation

2.3.2 Boundary conditions

2.3.3 Setting initial field

2.3.4 Fluid properties

2.3.5 Turbulence modelling

2.3.6 Time step control

2.3.7 Discretisation schemes

2.3.8 Linear-solver control

2.3.9 Running the code

2.3.10 Post-processing

2.3.11 Running in parallel

2.3.12 Post-processing a case run in parallel

3 Anwendungen und Bibliotheken

3.1 The programming language of OpenFOAM

3.1.1 Language in general

3.1.2 Object-orientation and C++

3.1.3 Equation representation

3.1.4 Solver codes

3.2 Compiling applications and libraries

3.2.1 Header .H files

3.2.2 Compiling with wmake

3.2.3 Removing dependency lists: wclean and rmdepall

3.2.4 Compilation example: the pisoFoam application

3.2.5 Debug messaging and optimisation switches

3.2.6 Linking new user-defined libraries to existing applications

3.3 Running applications

3.4 Running applications in parallel

3.4.1 Decomposition of mesh and initial field data

3.4.2 Running a decomposed case

3.4.3 Distributing data across several disks

3.4.4 Post-processing parallel processed cases

3.5 Standard solvers

3.6 Standard utilities

3.7 Standard libraries

4 OpenFOAM cases

4.1 File structure of OpenFOAM cases

4.2 Basic input/output file format

4.2.1 General syntax rules

4.2.2 Dictionaries

4.2.3 The data file header

4.2.4 Lists

4.2.5 Scalars, vectors and tensors

4.2.6 Dimensional units

4.2.7 Dimensioned types

4.2.8 Fields

4.2.9 Directives and macro substitutions

4.2.10 The #include and #inputMode directives

4.2.11 The #codeStream directive

4.3 Time and data input/output control

4.4 Numerical schemes

4.4.1 Interpolation schemes

4.4.2 Surface normal gradient schemes

4.4.3 Gradient schemes

4.4.4 Laplacian schemes

4.4.5 Divergence schemes

4.4.6 Time schemes

4.4.7 Flux calculation

4.5 Solution and algorithm control

4.5.1 Linear solver control

4.5.2 Solution under-relaxation

4.5.3 PISO and SIMPLE algorithms

4.5.4 Other parameters

5 Mesh generation and conversion

5.1 Mesh description

5.1.1 Mesh specification and validity constraints

5.1.2 The polyMesh description

5.1.3 The cellShape tools

5.1.4 1- and 2-dimensional and axi-symmetric problems

5.2 Boundaries

5.2.1 Specification of patch types in OpenFOAM

5.2.2 Base types

5.2.3 Primitive types

5.2.4 Derived types

5.3 Mesh generation with the blockMesh utility

5.3.1 Writing a blockMeshDict file

5.3.2 Multiple blocks

5.3.3 Creating blocks with fewer than 8 vertices

5.3.4 Running blockMesh

5.4 Mesh generation with the snappyHexMesh utility

5.4.1 The mesh generation process of snappyHexMesh

5.4.2 Creating the background hex mesh

5.4.3 Cell splitting at feature edges and surfaces

5.4.4 Cell removal

5.4.5 Cell splitting in specified regions

5.4.6 Snapping to surfaces

5.4.7 Mesh layers

5.4.8 Mesh quality controls

5.5 Mesh conversion

5.5.1 fluentMeshToFoam

5.5.2 starToFoam

5.5.3 gambitToFoam

5.5.4 ideasToFoam

5.5.5 cfx4ToFoam

5.6 Mapping fields between different geometries

5.6.1 Mapping consistent fields

5.6.2 Mapping inconsistent fields

5.6.3 Mapping parallel cases

6 Post-processing

6.1 paraFoam

6.1.1 Overview of paraFoam

6.1.2 The Properties panel

6.1.3 The Display panel

6.1.4 The button toolbars

6.1.5 Manipulating the view

6.1.6 Contour plots

6.1.7 Vector plots

6.1.8 Streamlines

6.1.9 Image output

6.1.10 Animation output

6.2 Post-processing with Fluent

6.3 Post-processing with Fieldview

6.4 Post-processing with EnSight

6.4.1 Converting data to EnSight format

6.4.2 The ensight74FoamExec reader module

6.5 Sampling data

6.6 Monitoring and managing jobs

6.6.1 The foamJob script for running jobs

6.6.2 The foamLog script for monitoring jobs

7 Models and physical properties

7.1 Thermophysical models

7.1.1 Thermophysical property data

7.2 Turbulence models

7.2.1 Model coefficients

7.2.2 Wall functions