4. Application of Interphase Mass Transfer
The chapter focuses on the application of interphase mass transfer, detailing the importance of dimensionless numbers such as the Sherwood, Reynolds, and Schmidt numbers in characterizing mass transfer processes. It discusses various correlations for mass transfer coefficients in different environmental contexts, such as lakes and rivers, and highlights the mathematical relationships that help in understanding these processes. Furthermore, it underscores the significance of accurate definitions and experimental measurements in the field of environmental mass transport.
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What we have learnt
- Understanding of dimensionless numbers related to mass transfer.
- Correlations for mass transfer coefficients in various environments.
- The impact of temperature gradients and density differences on mass transfer.
- The significance of different mass transport processes like evaporation, dissolution, and diffusion.
Key Concepts
- -- Sherwood Number (NSh)
- A dimensionless number representing the ratio of convective mass transport to diffusive mass transport.
- -- Reynolds Number (Re)
- A dimensionless number that predicts the flow regime in fluid dynamics, indicating whether the flow is laminar or turbulent.
- -- Schmidt Number (Sc)
- A dimensionless number that represents the ratio of momentum diffusivity to mass diffusivity.
- -- Mass Transfer Coefficient
- A parameter that quantifies the mass transfer rate across a phase boundary, typically denoted as K.
- -- Diffusion
- The process by which molecules spread from areas of high concentration to areas of low concentration.
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