Studies on pressure-drop characteristics of beds of equilateral and no
n-equilateral solid cylinders of aspect ratios ranging from 0.5 to 2.0
have been carried out. These studies have exposed the shortcomings of
the commonly used Ergun type correlations for predicting the pressure
drop in packed systems. An empirical correlation to predict pressure
drop in beds of cylindrical particles has been developed. In addition,
derivatives of cylinders, such as hollow cylinders, have been examine
d, and comparisons have been made with particles, such as spheres.