Virtual Diffusion Simulation

The simulation starts with this introduction.

The virtual cell's rate of diffusion is effected by the change in the variable presented above.  Different variable changes allow for different rates of diffusion.  The greatest rate of diffusion for this cell is at 4.64.  After a few tries, it is found that the rate of diffusion, and surface area to volume ratio decreases as the size of the radius increase.  However, the increase of dimples and the villi percent of cell surface are had no affect on diffusion.  The increase of dimples and the villi percent of cell surface area has and correlation relationship with the volume ratio; although, they don't affect the rate of diffusion.  Similarly, the surface area to volume ratio and rate of diffusion is not affected by the dimple percent of cell surface area.  When the structural shape of the cell itself changes the rate of diffusion changes.  As the cell becomes thin, the rate of diffusion increases.  The increase of diffusion is possibly due to the more accessible passage of particles in thinner/ flatter structures. Therefore, the cell's structural shape is the reason to the change in cell diffusion and not the other factors.    

Diffusion increases as the cell thins out/ flattens.

Source:  http://mhhe.com/biosci/genbio/biolink/j_explorations/ch02expl.htm