Wind

This mobile app simulates a 2D wind tunnel, capable of handling obstacles of any shape.It's so user-friendly: place obstacles on the graph paper on the screen and start the simulation to see a graphical display of pressure and velocity.

The simulation is performed on air passing through the space between the ceiling and floor.
The wind enters at a uniform speed from the left inlet and exits from the right outlet.
The air is treated as an incompressible viscous fluid.