Comparative Study on the Characteristics of Film Flow with Different Corrugation Plates

Abstract

The geometry of the packing structure can affect the flow pattern and considerably influence the mass transfer efficiency between liquid film and gas phase. Therefore, it is necessary to investigate the flow patterns and factors that determine the efficiency of mass transfer and heat transfer. In this study, different packing structures, namely, sinusoidal, triangular, and rectangular corrugated plates, are investigated. Computational fluid dynamic simulations based on the volume-of-fluid method are performed by using the open-source software OpenFOAM to study the liquid film flow over these corrugation plates. The freesurface area between the liquid and gas has been found to reach its maximum when the resonance phenomenon occurs. According to the simulation results the triangular corrugated plate has the largest free-surface area among the three types under the same conditions for a certain Reynolds number. The results also indicated that the pattern of film flow on the sinusoidal and triangular corrugated plates is similar; the rectangular type is not good as the other two types. It is useful to choose a suitable packing structure when considering the manufacturing process and cost The research results provide a theoretical basis for the study of heat and mass transfer used in industry applications.

Optimization of Screen-Hole-Clearing Devices for Mechanized Residual Film–Impurity Separation

“…Various studies have developed methods to evaluate the impact of airflow in solving the blockage problem; these methods have been useful in various fields. Li et al analyzed the fluidization and transport characteristics of particles by varying the frequency, speed, and flow rate of airflow pulsation, and obtained a suitable sorting medium for fine-grained coal [8]. Li proposed a variable-diameter pulsating airflow sorting technique for sorting pulverized coal and demonstrated the effects of the air volume and handling capacity on the flow field and sorting effect through numerical simulations and experiments [9].…”