Movie generated from a simulation of particles moving through a widening tube

<p>Simulation details:</p> <p>In this very simplified simulation approach, a fluid is streaming through a tube with a widening range from left to right, under the laws of quadratic velocity profile and Bernoulli equation. With the fluid, spherical droplets are moving from left to right, which are subjected to small random velocity changes, partially elastic collisions, and the Stokes friction force.</p> <p>This very simplified approach proves that the laws of Bernoulli and quadratic velocity profile are sufficient to lead to a clustering of the droplets, as observed in experiments performed by Dr. Jin Li in Prof. David Anthony Barrow&#39;s group at Cardiff University, Wales.</p> <p>The movie is generated from povray pictures of the configurations. In order to get a better feeling for the time evolution, I backed the video with an audio containing a recording of Ferdy Kaufmann&#39;s foxtrot Sellerie from the golden 1920s. I do not own the rights for this music.</p>