Interstage Backmixing in Oscillatory Flow in a Baffled Column

A factorial approach to understanding the effect of inner geometry of baffled meso-scale tubes on solids suspension and axial dispersion in continuous, oscillatory liquid–solid plug flows

“…This was computed by taking the average of all u p values within the given particle size range. Because of the monodispersed nature of the particles, a higher particles density might have a higher terminal velocity thus requiring a higher f and x o [28]. Oscillatory flow in a baffled tube is typically able to suspend solid particles up to 20 wt.% [28]; in this study 10 wt.% of PVC particles were used.…”

Residence time distribution and Peclet number correlation for continuous oscillatory flow reactors

“…As it is in most cases, the axial dispersion coefficient and thus Pe number were assumed to be constant along the reactor. The selection of dimensionless numbers and the form of the equation is derived from a detailed analysis of our experimental results, considering also findings presented in the literature . Therefore, while deriving the correlation, a sensitivity analysis was performed, with different forms and numbers of variables, i.e.…”

“…The vortices provide very good radial and axial mixing in the zone between two successive baffles whereby intensity of mixing depends only on frequency and amplitude of fluid oscillation . However, axial mixing occurring in oscillatory baffled tubes results in deviation of the desirable plug flow pattern …”

“…Experiments were carried out in order to determine the amount of physical back‐mixing occurring in the system, but the influence of operating parameters on back‐mixing were not quantified. Takriff and Masyithah determined the effects of various operating parameters on inter‐stage back‐mixing in a two stage oscillatory baffled column. The results of that study indicate that frequency and amplitude of oscillation are dominant parameters that increase the back‐mixing.…”

“…The results of that study indicate that frequency and amplitude of oscillation are dominant parameters that increase the back‐mixing. Further, the authors developed a mathematical model based on N‐CSTR with back‐flow model to determine the magnitude of back‐mixing …”