Diffusion Model

Activity Instructions

Follow the following guide to observe how a barrier with slits affects diffusion.

1. With the model turned off, pick settings for the number of particles on each side, and temperature. Leave these settings constant.
2. Set Barrier? to Off, Press Setup & Go. (This is your control system without a barrier. To compare models with barriers to this at any time, just switch barrier? to off and setup the model again)
3. Set Barrier? to On, Number-of-Slits to 5, and Width-of-Slits to 2.
4. Press Go and observe the behavior of the particles and compare it to how they behave without the barrier.
5. Select other setting for the number of slits.
   • How does changing the number of slits affect the behavior of the particles?
   • How does it change the process of diffusion?
6. Pick one setting for the number of slits. Run the model several times, changing just the slit width each time.
   • How does the slit width affect the particles and diffusion?