These movies display the y-velocity solution to a three dimensional turbulent fluid flow through a laboratory fumehood. The solution is plotted on a horizontal plane passing through the center of the fumehood inlet.
Each 10x10 grid of pixels correspond to one node in the turbulent flow fumehood model. The color changes are magnified by a factor of 15 to allow the observer to see small changes in velocity. Due to this the absolute mininmum and maximum velocities are not assigned colors at the ends of the palette, hence the color cannot be used as a scale to measure the velocity.
The outer blue border is not part of the simulation. The bottom green squares in frame one represent the boundary conditions of the flow and do not change through out the movie. The upper right quadrant represents an obstacle in the fumehood where there is no flow and thus no y-velocity.
There are two movies:
Changing Solution: Demonstates the constant changing of the y-velocity for the early iterations in the model. As you will see the velocity field changes in every frame in the movie and never settles down, indicating a stable solution has not been reached. These frames were cut every 50 iterations, from 1 to 3000 iterations.
Converged Solution: Demonstates how the velocity field settles down the last 10 frames in the movie and hardly changes, thus reprenting a converged solution. These frames were cut every 500 iterations, from 1 to 30,000 iterations.