Variable Coverings
Application of chemicals onto membranes are often in small areas, such as clumps of powder or drops of fluid. When the chemical is applied in this way the diffusion may seem higher than would be expected due to lateral diffusion.
In this work we considered how the separation, size and shape of the application areas, and the depth the membrane affected the relative flux and lag time out of the membrane and into the body. In the examples below we see a 2-d (infinite source) on the left, a square source in the middle and a circular source on the right. These are shown for two different membrane thicknesses (0.1 top and 1 bottom compared to a half distance of the separation of 2) and covering percentages of 40% and 4% respectively.
This was work with Annette Bunge and Jed Ley at the Colorado School of Mines.