Contact-Based Method to Evaluate Mixing in Multicomponent Experiments and Simulations

Abstract

A contact-based method to evaluate mixing in a multicomponent system is proposed in this work. The proposed method is based on spatial contact frequency. One component contacting another component more frequently in space yields a higher mixing index. The preliminary applications of this method in a quasi-2D binary experiment and a 3D ternary simulation are presented. Detailed mixing information is presented. Comparisons with other methods are made, and the advantages of this method can be summarized by the following: (i) it captures all mixing behavior described in other methods listed in this work and (ii) it provides more specific information about mixing which all other methods miss, such as the mixing index of any specific component or components with respect to any other or all components. The advantages of the proposed method and the disadvantages of the existing methods are discussed.

Heat transfer within dynamically structured bubbling fluidized beds subject to vibration: A two‐fluid modeling study

“…The extent of mixing within the bed according to the tracer in the solids phase was quantified using the intensity of segregation, IS 47–49 : where is the standard deviation of the mass fraction of tracer particles present in all CFD cells and and are the total number of tracer particles and all particles present in the system, respectively. The method to calculate and follows the same way as to calculate detailed earlier.…”

“…The extent of mixing within the bed according to the tracer in the solids phase was quantified using the intensity of segregation, IS [47][48][49] :…”