8. Interphase Mass Transfer – Boundary Layer and Mass Transfer Coefficient
The chapter focuses on interphase mass transfer and its governing principles, particularly emphasizing the concepts of boundary layers and mass transfer coefficients. Through an exploration of diffusion and convection, it highlights how these forces interact during mass transfer processes in various fluid systems. The chapter also discusses the significance of understanding mass transfer in environmental contexts, enabling more effective monitoring and analysis activities.
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What we have learnt
- Mass transfer occurs at the interface between phases and is influenced by both diffusion and convection.
- The boundary layer represents the region near a surface where velocity and concentration gradients affect mass transfer.
- The mass transfer coefficient is a crucial parameter for predicting the flux of species across boundaries in fluid systems.
Key Concepts
- -- Boundary Layer
- A region close to a surface where the effects of friction and concentration gradients are significant, influencing the mass transfer rates.
- -- Mass Transfer Coefficient
- A proportionality constant that relates the mass transfer flux to the concentration gradient across a boundary.
- -- Convection
- The transport of substances due to the bulk movement of fluid, which can enhance mass transfer rates significantly.
- -- Diffusion
- The process of movement of molecules from an area of high concentration to an area of low concentration, occurring at all times in fluid systems.
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