2.6 - Concentration Boundary Layer and Gradients
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Practice Questions
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Define the term 'mass transfer coefficient'.
💡 Hint: Think about what it measures.
What is the primary driving force for diffusion?
💡 Hint: From high to low concentration.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the concentration boundary layer affect?
💡 Hint: Think about how substances move across phases.
True or False: Diffusion is always dominant in turbulent flow.
💡 Hint: Consider the characteristics of turbid vs. calm waters.
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Challenge Problems
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Calculate the expected flux of a substance at a boundary layer given a concentration difference of 0.5 mol/m^3, and a mass transfer coefficient of 1.2 m/s.
💡 Hint: Remember the relationship between flux, concentration difference, and mass transfer coefficient.
Discuss how increasing the turbulence of a flow would affect mass transfer rates at the boundary layer. Provide a qualitative reasoning.
💡 Hint: Think about chaotic fluid movement versus smooth layering.
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