The shpanel code

shpanel is a simple Fortran based, Boundary Element Method solver for potential flow around a two-dimensional wing section.

This is the GitHub repository of shpanel source code, including instructions for running and compiling shpanel.

External Resources

The technical details of the numerical method used by shpanel and the code validation against numerical and experimental data are illustrated in Chapter 3 of:

• P. Olivucci (2016), A framework for the design by optimization of hydrofoils under cavitating conditions, Master Thesis, Universita' di Genova.

Source Download and Compilation

First, make sure you have a Fortran 90 compiler and a working copy of Matlab or Octave installed.

Then, acquire the source code by cloning the git repository:

git clone [email protected]:polivucci/shpanel.git

Now run make to build the shpanel executable. The command will automatically check the existence of Makefile.

Make sure the main script has execution permissions:

chmod +x ./run_shpanel.sh

Usage

Input files

shpanel input consists of two text files:

• shpanel_parameters.dat contains the main flow parameters,
• geometry_input.dat provides the wing section geometry.

The example directory contains two example input files.

Running an example case

First, make sure to copy the two input files from the example directory to the main directory. Now you can run the code by launching the script:

./run_shpanel.sh

If everything works correctly, you will see a shpanel banner and a summary of the input and the results printed to screen.

Output files

The main result summary will be stored in shpanel_output.dat. Complete output data will be stored in the sub-directory output/, including:

• draw_chord.dat, draw_contrp.dat, draw_profile.dat: wing section geometry,
• draw_field_l.dat: lower-surface pressure and velocity distributions,
• draw_field_u.dat: upper-surface pressure and velocity distributions.

Platform-Specific Notes

Linux

General

• Compilation has been tested with GCC version 4.7 or later.

Ubuntu

In order to compile and execute shpanel in the latest Ubuntu version please install the following packages:

sudo apt install gfortran