Mixing Characteristics for the single and air-water two-phase flows in
multichannel-based miniaturized fixed-bed devices
Abstract
Investigation on the miniaturized multichannel-based fixed-bed devices
to enhance the heat and mass transfer performance is the key focus in
the present study. Residence time distribution (RTD) is one of the most
critical parameters to characterize the device’s flow distribution. In
the current context, the RTDs of a liquid tracer for the air-water
two-phase concurrent flows across the multichannel-based miniaturized
fixed-bed devices (consist of 11 number of same dimensional parallel
channels) with the variable heights were measured by the conductivity
measurements and represented by axial dispersion model (ADM). The
stream-flow rates of the two phases varied within the range of 8.33 ×
10-8 – 3.83 × 10-7 m3 s-1. The axial dispersion coefficients and the
specific energy dissipation values were analyzed. The impacts of
pressure loss and the geometry on the hydrodynamic characteristics and
mixing properties were well expressed. Based on the experimental data,
new correlations were proposed.