4 - Diffusion
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Practice Questions
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Define diffusion in terms of concentration.
💡 Hint: Think about how smells spread in a room.
What is the primary factor affecting effective diffusivity?
💡 Hint: How open is the material?
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What drives the process of diffusion?
💡 Hint: It's about where something is more and less present.
True or False: The local equilibrium assumption holds true for all flow velocities.
💡 Hint: At high speeds, processes change quickly.
1 more question available
Challenge Problems
Push your limits with advanced challenges
Describe a real-world scenario where the local equilibrium assumption may fail. What implications would that have for modeling diffusion?
💡 Hint: Consider factors like time and speed in response to diffusion.
Using Fick's laws, derive the mathematical expression for effective diffusivity in a soil-water system, incorporating porosity.
💡 Hint: Start with diffusion equations and how they relate to porous media.
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