A molecular explanation of airflow: pressure and velocity

Elastic collision simulations used to model the kinetic theory of gas. I introduce the concept of a speed signal to explain the exchange between pressure and velocity in airflow. It is the underlying mechanism that leads to Bernoulli's equation, but it is not limited to flow with simplifying assumptions such as the flow being steady, incompressible or inviscid. I show the effect of temperature and density on the Maxwell-Boltzmann distribution. I have included the effect of duct geometry on choked flow and supersonic expansion, but an explanation of flow through a converging duct or venturi will be covered in a future video.