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OpenFOAM_tutorials

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Learn OpenFOAM by doing tutorials

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# OpenFOAM Tutorials

This repository contains the tutorial cases used with the book
**OpenFOAM Training Through Problem Solving**. The examples cover
incompressible flow, two-phase flow, heat transfer, conjugate heat transfer,
rotating machinery, OpenFOAM programming, free-surface hydraulics, combustion,
urban wind flow, and particle flow.

## Current Structure

| Folder | Role | Status |
| --- | --- | --- |
| `OpenFOAM-9/` | Main tutorial set aligned with the current book text | Canonical |
| `OpenFOAM-10/` | Partial migration of selected chapters | In progress |
| `OpenFOAM-3.0.1/`, `OpenFOAM-4/`, `OpenFOAM-5/`, `OpenFOAM-7/`, `OpenFOAM-8/` | Older case snapshots | Historical |
| `Extra_tutorials/` | Additional examples outside the main chapter sequence | Supplementary |
| `Movies/` | Output videos and animations | Reference media |
| `swak4Foam/` | Supporting swak4Foam material | Optional dependency |

`OpenFOAM-9/` should be treated as the first place to update when the book
content changes. Older release folders should be changed only when intentionally
maintaining compatibility.

## Chapter Index

| Chapter | Case | Main solver or topic | Canonical path |
| --- | --- | --- | --- |
| 1 | `cavityInPipe` | `icoFoam` | `OpenFOAM-9/chapter1/cavityInPipe` |
| 2 | `ellipsoidal` | `interFoam` | `OpenFOAM-9/chapter2/ellipsoidal` |
| 3 | `elbow` | `buoyantSimpleFoam` | `OpenFOAM-9/chapter3/elbow` |
| 4 | `multiRegionHeater` | `chtMultiRegionFoam` | `OpenFOAM-9/chapter4/multiRegionHeater` |
| 4 | `multiRegionHeaterFine` | `chtMultiRegionFoam` | `OpenFOAM-9/chapter4/multiRegionHeaterFine` |
| 5 | `propeller` | `simpleFoam` with MRF | `OpenFOAM-9/chapter5/propeller` |
| 6 | `heatedCavity` | Heat-transfer case setup | `OpenFOAM-9/chapter6/heatedCavity` |
| 6 | `icoHeatFoam` | Custom solver programming | `OpenFOAM-9/chapter6/icoHeatFoam` |
| 7 | `spillWay` | `interFoam` | `OpenFOAM-9/chapter7/spillWay` |
| 8 | `coFlowFlame2D` | `reactingFoam` | `OpenFOAM-9/chapter8/coFlowFlame2D` |
| 9 | `pitzDaily3D` | `XiFoam` | `OpenFOAM-9/chapter9/pitzDaily3D` |
| 10 | `coarse`, `fine` | Urban wind flow with `simpleFoam` | `OpenFOAM-9/chapter10` |
| 11 | `denseParticleFoam` | Particle flow in cyclone | `OpenFOAM-9/chapter11/denseParticleFoam` |

The machine-readable version of this index is kept in `tutorials.yml`.

## Requirements

The recommended learning environment is Ubuntu LTS with OpenFOAM installed from
the official distribution packages. For the canonical cases, install
OpenFOAM 9:

```bash
sudo apt-get install git
```

Then follow the OpenFOAM 9 installation instructions:

```text
https://openfoam.org/download/9-ubuntu/
```

Some cases use `swak4Foam` features. Install it only for chapters or variants
that require it:

```text
https://openfoamwiki.net/index.php/Installation/swak4Foam/Downloading#swak4Foam_development_version
```

## Running a Case

From inside a case folder:

```bash
./Allclean
./Allrun
```

Most case folders follow the standard OpenFOAM layout:

```text
0/
constant/
system/
Allrun
Allclean
```

Some chapters contain parent-level scripts that run more than one subcase. For
example, chapter 10 has `coarse` and `fine` case folders plus a parent
`Allrun`.

## Maintenance Workflow

1. Update the canonical `OpenFOAM-9/` case first.
2. Record the change in `tutorials.yml` when the case structure, solver, or
   dependency changes.
3. Run the structure checker:

```bash
   tools/check_tutorials.sh
   ```

4. Migrate the change to `OpenFOAM-10/` only after the canonical case is clear.
5. Treat older OpenFOAM release folders as archived compatibility references.

## Citation

Please cite and refer to the guidebook whenever you use this material:

```text
http://dx.doi.org/10.13140/RG.2.2.25519.61601
```

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