For ‘Heat and Mass Transfer’ subsequently the different transport mechanisms for heat and mass (molecules) will be introduced and discussed: molecular transport, convective transport and radiation (heat only). For molecular transport (in case of heat and mass this is conduction respectively diffusion) both stationary as well as instationary (transient) transport will be treated, mostly based on analytical solutions (among which the penetration-theory) for Fourier’s Law. For convective transport, both forced and free (‘natural’) convection will be discussed, based on correlations for the transport coefficients. Convective transport will be discussed for flow through tubes and past objects (sphere, plate, cylinder). For laminar flow analytical solutions and approximations will be used (laminar tube flow, boundary layer theory). Tools and methods introduced in the Numerical Methods sections will be applied and used for comparison. For turbulent flow the approach using experiment-based correlations prevails.|
Heat transfer by radiation is confined to (chemical) engineering applications. Mass transfer from one phase to another will be introduced as analogy to heat transport. Hereby the film model will be introduced. Attention will be given to the specific differences between heat and mass transfer, like a difference in solubility (distribution coefficient) and a possible effect of drift flux. Additionally, the phenomenon of coupled heat and mass transport will be discussed.
Finally, conceptual descriptions for concurrent and counter current apparatuses for heat and mass transfer will be discussed.
This course is only accessible for students of the PT course.