TunnelSim solves the continuity equation for a geometry that you specify using sliders and input boxes. The analysis is limited to incompressible, inviscid, one-dimensional flows, and the program warns the user if the diffuser angle exceeds a separation criteria (> 7 degrees) or if the speed in any section of the tunnel exceeds 300 mph. Calculations are in English or Metric units.

The license of this software is Freeware, you can free download and free use this calculator software.