Openpipeflow

https://openpipeflow.org/
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Openpipeflow is a high-performance Navier-Stokes solver designed for direct numerical simulations...
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### Set up initial condition and start run

Source: https://openpipeflow.org/index.php?diff=78&oldid=75&title=Manual

Move the install directory to a run directory, copy an output state (e.g., state0012.cdf.dat) to state.cdf.in as the initial condition, and start the run with nohup. If resolutions do not match, they are automatically interpolated or truncated.

```bash
> mv install ~/runs/job0001
> cd ~/runs/job0001/
> cp .../state0012.cdf.dat state.cdf.in
```

```bash
> nohup ./main.out > OUT 2> OUT.err &
```

--------------------------------

### Set up a run directory and start the simulation

Source: https://openpipeflow.org/index.php?action=edit&oldid=50&title=Manual

Move the install directory to a run directory, copy an initial condition to state.cdf.in, and launch the main program with nohup, redirecting output to OUT and errors to OUT.err.

```shell
> mv install ~/runs/job0001
> cd ~/runs/job0001/
> cp .../state0100.cdf.dat state.cdf.in
> nohup ./main.out > OUT 2> OUT.err &
```

--------------------------------

### Tutorial output directory

Source: https://openpipeflow.org/index.php?oldid=986&title=Xubuntu-Openpipeflow_virtual_disk_image

Example output from following the Tutorial can be found in this directory.

```text
 /home/xubuntu/Openpipeflow/tutorial/

```

--------------------------------

### Tutorial output directory on virtual machine

Source: https://openpipeflow.org/index.php?title=Xubuntu-Openpipeflow_virtual_disk_image

Path where an example output from the Tutorial can be found on the virtual machine.

```text
 /home/xubuntu/Openpipeflow/tutorial/
```

--------------------------------

### Packages installed on virtual machine via apt-get

Source: https://openpipeflow.org/index.php?title=Xubuntu-Openpipeflow_virtual_disk_image

Package installation commands executed on the virtual machine. These include gfortran, liblapack-dev, libfftw3-dev, and libnetcdf-dev to support Openpipeflow.

```bash
  sudo apt-get install gfortran
  sudo apt-get install liblapack-dev
  sudo apt-get install libfftw3-dev
  sudo apt-get install libnetcdf-dev
```

--------------------------------

### Install required packages

Source: https://openpipeflow.org/index.php?oldid=986&title=Xubuntu-Openpipeflow_virtual_disk_image

Commands to install the necessary packages for Openpipeflow: gfortran, liblapack-dev, libfftw3-dev, and libnetcdf-dev.

```bash
  sudo apt-get install gfortran
  sudo apt-get install liblapack-dev
  sudo apt-get install libfftw3-dev
  sudo apt-get install libnetcdf-dev

```

--------------------------------

### Example newton.dat output

Source: https://openpipeflow.org/index.php?title=Newton.f90

Output file showing iteration progress, GMRES iterations, and error metrics.

```text
       14679          150       279939
 0     0  0.21542E-02  0.21542E-03  0.25636E-01  0.84033E-01
 1    18  0.46324E-03  0.21542E-03  0.55202E-02  0.83918E-01
 2    19  0.12734E-03  0.83324E-04  0.15176E-02  0.83905E-01
 3    23  0.20499E-04  0.83324E-04  0.24427E-03  0.83920E-01
```

--------------------------------

### Search for installed library files

Source: https://openpipeflow.org/index.php?diff=prev&oldid=1085&title=Getting_started

If a library is installed but not found, search for the library files using `ls`. The output shows examples of found library files.

```bash
:/> ls  */*/liblapack*  */*/*/libfftw3* */*/*/libnetcdf*
etc/alternatives/liblapack.so.3
etc/alternatives/liblapack.so.3gf
usr/lib/i386-linux-gnu/libfftw3_omp.so.3
usr/lib/i386-linux-gnu/libfftw3_omp.so.3.3.2
usr/lib/i386-linux-gnu/libfftw3.so.3
usr/lib/i386-linux-gnu/libfftw3.so.3.3.2
usr/lib/i386-linux-gnu/libnetcdff.so.6
usr/lib/i386-linux-gnu/libnetcdf.so.11

```
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