text: turbulence? is it possible to make a theoretical model to describe the behavior of a turbulent fluid (in particular, its internal structures)? yes, it is possible.  however, you don't get turbulent flow in a fluid unless you consider the interaction forces on a particle of its neighbors.  these interactions are often nonlinear, and what comes out is so-called "chaotic" behavior.    chaotic behavior is characterized by the fact that a slight difference in initial conditions can lead to extremely different conditions down the line.  because of this nonlinear behavior, the differential equations governing the motion of the particles are hard to solve analytically.  the best (only?) way to do it is to find numerical solutions.  there is an entire subfield of physics/engineering devoted to this, called "computational fluid dynamics".    ost of the time the process is to divide the fluid up into a bunch of little regions, and calculate the forces on them based on what's happening in nearby regions.  do this for all of the regions, then advance the time by some small increment.  this is the basic idea behind most computational simulations.  anyway, here you can probably learn some more about modelling turbulent flow, but keep in mind that this subject could be taught in a full-year graduate engineering course and still be only very-lightly touched on.  some people spend their lives studying this stuff: http://www.flow3d.com/cfd-101/turb.htm http://www.ecs.umass.edu/mie/faculty/perot/modeling.htm