"Single Pipe Flow" is an Android-App written by Martin Rybicki and Ruslan Krenzler in 2012. The aim was to contruct a simple, user friendly application which simulates the gas dynamics in an exhaust pipe with constant cross section in real time.

The model which describes the dynamics and the numerical computation of the model are based on the article Modelling and simulation of gas dynamics in an exhaust pipe from 2012 by Ingenuin Gasser and Martin Rybicki. However, a short description of the physical and mathematical background can be found here.

1. The App starts ...		2. Before starting the computation the user can change the problem settings, i.e. parameters, pipe geometry as well as initial and boundary conditions.
3. After the customization of the problem settings, the user hits the "Run!" button to start the computation. The progress is shown in the above progress bar. When the computation completes, the user recieves a notification.		4. The results of the compution can be displayed by hitting the "Play" button. The user can change dynamically between the four observable quantaties, such as density (ρ), ratio of unburnt gas (z), velocity (u) and temperature (T).

The app is available for download.

Release Date	Version	Describtion	Download Link
24/10/2012	0.2.0	first release	download 0.2.0
14/11/2012	0.2.1	bug fixes, some UI changes	download 0.2.1

For the installation you require a Smartphone with Android 2.2 (API 8) or higher. If you do not have a physical device with Android running, you can use an Android emulator to run it on your PC or laptop. You can either use the AVD Manager to cerate an Android Virtual Device, which is OS-independant and open source, but is slow and requires to install Eclipse and Android SDK first, or you can use BlueStacks, which is fast and light, but only available for Windows and Mac.

The graph you see in the fourth picture is produced by the charting software library for Android applications named AChartEngine.

Single Pipe Flow is contributed based on the CC BY-NC-SA 3.0 license.

The authors are looking foward for suggestions, questions, bug reports etc. Just email us.