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Welcome to the gas-network project Wiki!

This is a description of an open-source tool-set intended to perform numerical simulations of a network gas transmission pipelines.

Dependencies Installation Instructions:

• Linux Installation
• Windows Installation

Tool-set Installation:

Clone git repository to work location and compile:

git clone https://github.com/urrfinjuss/gas-network.git
cd ./gas-network
make simulate

Note: Modify Makefile as needed to set proper paths for libraries and headers

Running demonstration network directly from terminal:

cd ./demo/simulation_1
./simulate.x python.cfg

To Use GUI to run and view simulation (only Linux GUI works now) it is necessary to have Python 3.3+

It is convenient to have pip (Python package manager) to add packages to Python.

Ubuntu:

apt-get install python-pip

Gentoo:

emerge --ask dev-python/pip

After pip is installed, make sure that the following packages are present: tkinter, matplotlib, scipy, networkx

pip install --user tkinter
pip install --user matplotlib
pip install --user scipy
pip install --user networkx

To start GUI go to your ~/gas-network/demo/simulation_1 directory and type:

./gas.py

when the GUI pops-up, load the network by clicking File->Load and choose the demo_1.txt

Mathematical Model

1. Microscopic Model

• Formulation
• Boundary and Initial Conditions
• Details of Numerical Algorithm

2. Adiabatic Model

• Formulation
• Boundary and Initial Conditions
• Details of Numerical Algorithm

3. Deterministic and Noisy Simulations

• Noise Generation

Input Overview

1. Network Configuration
2. Initial Conditions
3. Types of Boundary Conditions
4. Compressors and Gas Withdrawal Nodes.

Output Format

1. Temporal data file:

The files named temporal_pressure.txt and temporal_flux.txt are generated in the course of the simulation. They mark the pressure $P(x_j,t)$ and gas flux $\phi(x_j,t)$ at several points along the gas pipes.

2. Spatial data file:

The directories named pipe_ NUMBER will be created in the directory where the code is run. The files contain the gas pressure (MPa) and gas flux (kg/m^2/s) sampled on a uniformly spaced grid for the pipe NUMBER. The time of the sampling is written in the header of each of the files.