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Tutorials v202104.1.0
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26 changes: 26 additions & 0 deletions .github/ISSUE_TEMPLATE/issue-template.md
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---
name: Issue template
about: Check this out before opening an issue

---
<!-- markdownlint-disable-file MD041 -->
<!--
Hey! Thank you for reporting an issue!
Just to make sure: is this really an issue or do you need some help
with troubleshooting? Please use our community channels if you need help:
https://precice.org/community-channels.html
Thanks! :-)
Please wrap any error messages with three backticks before and after:
```
This is an error message
```
If this is a bug, please provide the following information.
You can generate log files with `./run.sh > solver.log 2>&1`.
-->

- Tutorials state (last commit / release):
- Versions of solvers and adapters used:
- preCICE version:
- Log files:
3 changes: 3 additions & 0 deletions .github/pull_request_template.md
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<!-- Please submit your Pull Request to the `develop` branch.
It may help to have a look at the file `CONTRIBUTING.md` for a few hints and guidelines. -->
14 changes: 14 additions & 0 deletions .github/workflows/check-links.yml
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name: Check links
on: [push, pull_request]
jobs:
check_links:
runs-on: ubuntu-latest
steps:
- name: Check out repository
uses: actions/checkout@v2
- name: Check links in markdown files (markdown-link-check)
uses: gaurav-nelson/github-action-markdown-link-check@v1
with:
use-quiet-mode: 'yes'
use-verbose-mode: 'no'
config-file: '.markdown-link-check-config.json'
14 changes: 14 additions & 0 deletions .github/workflows/check-markdown.yml
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name: Lint docs
on: [push, pull_request]
jobs:
check_md:
runs-on: ubuntu-latest
steps:
- name: Check out repository
uses: actions/checkout@v2
- name: Lint markdown files (markdownlint)
uses: articulate/actions-markdownlint@v1
with:
config: .markdownlint.json
files: '.'
ignore: changelog-entries
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name: Checks
name: Check scripts
on: [push, pull_request]
jobs:
checks:
check_scripts:
runs-on: ubuntu-latest
steps:
- name: Check out repository
uses: actions/checkout@v2
- run: bash tools/check.sh
- run: bash tools/check-size.sh
- name: Run ShellCheck
uses: ludeeus/action-shellcheck@master
env:
SHELLCHECK_OPTS: -e SC1091
3 changes: 3 additions & 0 deletions .markdown-link-check-config.json
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"aliveStatusCodes": [429, 403, 200]
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4 changes: 4 additions & 0 deletions .markdownlint.json
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"MD033": false
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130 changes: 130 additions & 0 deletions CODE_OF_CONDUCT.md
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# Contributor Covenant Code of Conduct

<!-- markdownlint-configure-file {"MD034": false } -->

## Our Pledge

We as members, contributors, and leaders pledge to make participation in our
community a harassment-free experience for everyone, regardless of age, body
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We pledge to act and interact in ways that contribute to an open, welcoming,
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## Our Standards

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community include:

* Demonstrating empathy and kindness toward other people
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* Giving and gracefully accepting constructive feedback
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and learning from the experience
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overall community

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## Enforcement Responsibilities

Community leaders are responsible for clarifying and enforcing our standards of
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Community leaders have the right and responsibility to remove, edit, or reject
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## Scope

This Code of Conduct applies within all community spaces, and also applies when
an individual is officially representing the community in public spaces.
Examples of representing our community include using an official e-mail address,
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## Enforcement

Instances of abusive, harassing, or otherwise unacceptable behavior may be
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info at precice.org.
All complaints will be reviewed and investigated promptly and fairly.

All community leaders are obligated to respect the privacy and security of the
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## Enforcement Guidelines

Community leaders will follow these Community Impact Guidelines in determining
the consequences for any action they deem in violation of this Code of Conduct:

### 1. Correction

**Community Impact**: Use of inappropriate language or other behavior deemed
unprofessional or unwelcome in the community.

**Consequence**: A private, written warning from community leaders, providing
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### 2. Warning

**Community Impact**: A violation through a single incident or series
of actions.

**Consequence**: A warning with consequences for continued behavior. No
interaction with the people involved, including unsolicited interaction with
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includes avoiding interactions in community spaces as well as external channels
like social media. Violating these terms may lead to a temporary or
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### 3. Temporary Ban

**Community Impact**: A serious violation of community standards, including
sustained inappropriate behavior.

**Consequence**: A temporary ban from any sort of interaction or public
communication with the community for a specified period of time. No public or
private interaction with the people involved, including unsolicited interaction
with those enforcing the Code of Conduct, is allowed during this period.
Violating these terms may lead to a permanent ban.

### 4. Permanent Ban

**Community Impact**: Demonstrating a pattern of violation of community
standards, including sustained inappropriate behavior, harassment of an
individual, or aggression toward or disparagement of classes of individuals.

**Consequence**: A permanent ban from any sort of public interaction within
the community.

## Attribution

This Code of Conduct is adapted from the [Contributor Covenant][homepage],
version 2.0, available at
https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.

Community Impact Guidelines were inspired by [Mozilla's code of conduct
enforcement ladder](https://github.com/mozilla/diversity).

[homepage]: https://www.contributor-covenant.org

For answers to common questions about this code of conduct, see the FAQ at
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4 changes: 3 additions & 1 deletion CONTRIBUTING.md
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# Contribute to the preCICE tutorials

It is amazing that you want to contribute a tutorial case for preCICE!

We welcome contributions and we have a few guidelines and tips that you can follow in the [preCICE website](https://precice.org/community-contribute-to-precice.html).
We welcome contributions and we have a few guidelines and tips that you can follow in the [preCICE website](https://precice.org/community-contribute-to-precice.html).
48 changes: 27 additions & 21 deletions elastic-tube-1d/README.md
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Expand Up @@ -5,16 +5,18 @@ keywords: OpenFOAM, python
summary: The 1D Elastic Tube is a FSI case, that consists of an internal flow in a flexible tube. The flow is unsteady and incompressible. This tutorial contains C++ and Python variants of the fluid and solid solvers. Running the simulation takes just 1-2 minutes.
---

{% include note.html content="Get the [case files of this tutorial](https://github.com/precice/tutorials/tree/master/elastic-tube-1d). Read how in the [tutorials introduction](https://www.precice.org/tutorials.html)." %}

## Setup

We want to simulate the internal flow in a flexible tube as shown in the figure below (image from [1]).

![FSI3 setup](images/tutorials-elastic-tube-1d-setup.png)

The flow is assumed to be incompressible flow and gravity is neglected. Due to the axisymmetry, the flow can be described using a quasi-two-dimensional continuity and momentum equations. The motivation and exact formulation of the equations that we consider can be found in [2].
The flow is assumed to be incompressible flow and gravity is neglected. Due to the axisymmetry, the flow can be described using a quasi-two-dimensional continuity and momentum equations. The motivation and exact formulation of the equations that we consider can be found in [2].

The following parameters have been chosen:

- Length of the tube: L = 10
- Inlet velocity: $$ v_{inlet} = 10 + 3 sin (10 \pi t) $$
- Initial cross sectional area = 1
Expand All @@ -23,27 +25,25 @@ The following parameters have been chosen:
- Fluid density: $$ \rho = 1 $$
- Young modulus: E = 10000


## Available solvers

Both fluid and solid participant are supported in:

* *C++*: An example solver using the intrinsic [C++ API of preCICE](couple-your-code-api.html). This solver also depends on LAPACK (e.g. on Ubuntu `sudo apt-get install liblapack-dev`)
* *Python*: An example solver using the preCICE [Python bindings](installation-bindings-python.html). This solver also depends on the Python libraries `numpy scipy matplotlib vtk mpi4py`, which you can get from your system package manager or with `pip3 install --user <package>`.

- *C++*: An example solver using the intrinsic [C++ API of preCICE](https://www.precice.org/couple-your-code-api.html). This solver also depends on LAPACK (e.g. on Ubuntu `sudo apt-get install liblapack-dev`)
- *Python*: An example solver using the preCICE [Python bindings](https://www.precice.org/installation-bindings-python.html). This solver also depends on the Python libraries `numpy scipy matplotlib vtk mpi4py`, which you can get from your system package manager or with `pip3 install --user <package>`.

### Building the C++ Solver

In order to use the C++ solver, you first need to build the scripts `FluidSolver` and `SolidSolver`. Each script needs to be built separately.

```
```bash
cd fluid-cpp
mkdir build && cd build
cmake ..
make all
```

```
```bash
cd solid-cpp
mkdir build && cd build
cmake ..
Expand All @@ -52,38 +52,43 @@ make all

Building can be skipped if you do not plan to use the C++ version.

## Running the Simulation
## Running the Simulation

### C++

Open two separate terminals and start each participant by calling the respective run script.
Open two separate terminals and start each participant by calling the respective run script.

```
```bash
cd fluid-cpp
./run.sh
```

and
```

```bash
cd solid-cpp
./run.sh
```

The solvers use the parameters `N = 100`, `tau = 0.01`, `kappa = 100` by default and can be modified in the solver.
The solvers use the parameters `N = 100`, `tau = 0.01`, `kappa = 100` by default and can be modified in the solver.

### Python

Open two separate terminals and start each participant by calling the respective run script. Only serial run is possible:

```
```bash
cd fluid-python
./run.sh
```

and
```

```bash
cd solid-python
./run.sh
```
Parameters such as `N` can be modified directly at the `FluidSolver.py` and at the `SolidSolver.py`. The parameters must be consistent between the different solvers and participants.

Parameters such as `N` can be modified directly at the `FluidSolver.py` and at the `SolidSolver.py`. The parameters must be consistent between the different solvers and participants.

**Optional:** Visualization and video output of the fluid participant can be triggered via the options `--enable-plot` and `--write-video` of `FluidSolver.py`. To generate .vtk files during execution, you need to add the flag `--write-vtk`.

Expand All @@ -94,21 +99,27 @@ Parameters such as `N` can be modified directly at the `FluidSolver.py` and at t
## Post-processing

The results from each simulation are stored in each `fluid-<participant>/output/` folder. You can visualize these VTK files using the provided `plot-diameter.sh` script

```bash
./plot-diameter.sh
```

which will try to visualize the results from both fluid cases, if available.

This script calls the more flexible `plot-vtk.py` Python script, which you can use as

```bash
python3 plot-vtk.py <quantity> <case>/output/<prefix>
```

Note the required arguments specifying which quantity to plot (`pressure`, `velocity` or `diameter`) and the name prefix of the target vtk files.

For example, to plot the diameter of the fluid-python case using the default prefix for VTK files, `plot-diamter.sh` executes:
For example, to plot the diameter of the fluid-python case using the default prefix for VTK files, `plot-diameter.sh` executes:

```bash
python3 plot-vtk.py diameter fluid-python/output/out_fluid_
```

![FSI3 setup](images/tutorials-elastic-tube-1d-diameter.png)

## References
Expand All @@ -119,8 +130,3 @@ python3 plot-vtk.py diameter fluid-python/output/out_fluid_

[3] M. Mehl, B. Uekermann, H. Bijl, D. Blom, B. Gatzhammer, and A. van Zuijlen.
Parallel coupling numerics for partitioned fluid-structure interaction simulations. CAMWA, 2016.





8 changes: 5 additions & 3 deletions elastic-tube-3d/README.md
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Expand Up @@ -5,21 +5,23 @@ keywords: FSI, OpenFOAM, CalculiX, nearest-projection, IMVJ
summary: Tutorial for an FSI simulation of a three-dimensional expanding tube scenario
---

{% include note.html content="Get the [case files of this tutorial](https://github.com/precice/tutorials/tree/master/elastic-tube-3d). Read how in the [tutorials introduction](https://www.precice.org/tutorials.html)." %}

## Setup

The expanding tube test case involves a cylindrical fluid domain surrounded by a solid domain. A pressure inlet boundary condition is applied at the inlet for 3 milliseconds, and then 0 set to zero for a further 7 millisecond. The pressure of the fluid expands the tube which then relaxes once the pressure decreases.

The expanding tube test case comes with the interface surface mesh connectivity of the solid domain. This allows the use of nearest-projection mapping of the displacements of the solid domain. In order to run the example with nearest projection mapping, the "node-mesh-with-connectivity" has been specified in the `solid-calculix/config.yml` file. More details can be found in the [CalculiX configuration description](adapter-calculix-config.html#nearest-projection-mapping).
The expanding tube test case comes with the interface surface mesh connectivity of the solid domain. This allows the use of nearest-projection mapping of the displacements of the solid domain. In order to run the example with nearest projection mapping, the "node-mesh-with-connectivity" has been specified in the `solid-calculix/config.yml` file. More details can be found in the [CalculiX configuration description](https://www.precice.org/adapter-calculix-config.html#nearest-projection-mapping).

## Available solvers

Fluid participant:

* OpenFOAM. This tutorial is known to work with OpenFOAM 4.1, 5.0, but it should also work with newer versions. The case files are prepared for the latest versions of OpenFOAM and use the solver `pimpleFoam`. In case you are using a previous OpenFOAM version you need to adjust the solver to `pimpleDyMFoam` in the `Fluid/system/controlDict` file. For more information, have a look at the [OpenFOAM adapter documentation](adapter-openfoam-overview.html).
* OpenFOAM. This tutorial is known to work with OpenFOAM 4.1, 5.0, but it should also work with newer versions. The case files are prepared for the latest versions of OpenFOAM and use the solver `pimpleFoam`. In case you are using a previous OpenFOAM version you need to adjust the solver to `pimpleDyMFoam` in the `Fluid/system/controlDict` file. For more information, have a look at the [OpenFOAM adapter documentation](https://www.precice.org/adapter-openfoam-overview.html).

Solid participant:

* CalculiX. This tutorial is known to work with CalculiX 2.15, but it should also work with newer versions. For more information, have a look at the [CalculiX adapter documentation](adapter-calculix-overview.html).
* CalculiX. This tutorial is known to work with CalculiX 2.15, but it should also work with newer versions. For more information, have a look at the [CalculiX adapter documentation](https://www.precice.org/adapter-calculix-overview.html).

## Running the simulation

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