Dynamic hold-up of packings with vertical walls

The packings with vertical walls and especially the ‘honeycomb’ packings are distinguished for their lowest pressure drop per one transfer unit. Yet there are no universal relationships for calculating the dynamic hold-up of that type of packings. The present work proposes equations for calculating this value under and over the loading point, derived on the basis of the experimental data for 11 arranged packings of that type with different form and dimensions.