Tank In Series TIS and Dispersion Plug Flow DPF Models

COMPARISION OF TANK IN SERIES (TIS) AND DISPERSION PLUG FLOW (DPF) MODELS 

Both the tank in series (TIS) and the dispersion plug flow (DPF) models require traeer tests for their aeeurate determination. However, the TIS model is relatively simple mathematieally and thus ean be used with any kineties. Also, it ean be extended to any eonfiguration of eompartments witli or without reeycle. The DPF axial dispersion model is eomplex and therefore gives signifieantly different results for different ehoiees of boundary eonditions. 

For a large dispersion (small Np ), the TIS model is preferred. The TIS model provides a meehanism that is readily visualized and often used. The Gamma and dispersion models ean be related by equating the varianees of their respeetive E(6) funetions. This gives 

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