Diffusion Model

Activity Instructions

Follow the following guide to simulate and observe diffusion.

1. Select the following settings on the model
   • Show-Direction?: Your Choice
   • Show-path?: Your Choice
   • Number-of-Particles-on-Left: 50
   • Number-of-Particles-on-Right: 50
   • Barrier?: Off
   • Temperature: 25
2. Press Setup
   • What is different about this setup?
   • How do you think this will affect the model?
3. Press Go and observe what happens as the model runs. To reset the model at any time, stop the model and press Setup. Press Go again to start the model.
   • What happens to the particles?
   • Do the particles on the left behave differently from those on the right?
4. Stop the model, change the settings for Number-of-Particles-on-Left & Number-of-Particles-on-Right, press Setup, and then press Go.
   • Do this different times with different numbers. What do you observe? Is there a pattern to your observations? Use the graph and counts on the right to track how many particles are on either side at any time.