proposed a computer simulation in which viscosity is modelled by the Brownian motion of vorticity (strictly we should talk about the Wiener Process rather than Brownian motion). The Brownian motion is derived from a pseudo-random number generator. Anyone with any ordinary curiosity would be asking how this kind of model could be applied to an obvious target: quantum mechanics.
There is a demonstration of Chorin's model in the programs KHI.BAS and KARMAN.BAS which you can find on the 'Second Front' page of this website. You will see that Chorin's model is a natural way to tackle topics such as the Kelvin-Helmholtz instability and the breaking of symmetry which occurs during the formation of the Von Karman vortex street. Chorin may be found at