Help pages relevant to each aspect of ThermoTun-Online can be opened in a new window by clicking the "..more" links in each section. These pages are designed to be moved to the side of your browser and left open. Further help pages will open in the same window.

Using Thermotun-Online

About ThermoTun-Online

How to use ThermoTun-Online

Understanding Parameters in ThermoTun-Online

There are 5 different cases in ThermoTun-Online, and each has a detailed help page detailing input parameters and output. Select the help file for the relevant case below.

Case 1. Single train in a tunnel
A single train passes through a simple tunnel

Case 1: Single Train in a Tunnel
Case 1 Help

Case 2. Crossing trains in a tunnel
Two trains cross within a simple tunnel

Case 2: Crossing Trains in a Tunnel
Case 2 Help

Case 3. Tunnel with an airshaft
A single train passes through a tunnel with an airshaft

Case 3: Tunnel with an Airshaft
Case 3 Help

Case 4. Emergency ventilation
A train comes to a rest within the tunnel. Then a fan is switched on.

Case 4: Emergency Ventilation
Case 4 Help

Case 5. Flared entrance to reduce pressure gradients
A train passes through a tunnel with a flared entrance region.

Case 5: Flared Entrance to Reduce Pressure Gradients
Case 5 Help

6. Micro Pressure Waves
A pressure wave reflecting at the portal results in a disturbance outside the tunnel.

Case 6: Micro Pressure Waves
Case 6 Help