Characterization and quantification of the quality of gas flow distributions

► The coefficient of variation (CoV) is frequently used to express the homogeneity of a velocity distribution. ► The CoV does not contain spacial information of a velocity distribution. ► Combination of CoV and a characteristic length scale leads to the definition of the coefficient of distribution (CoD). ► The CoD can be evaluated for any 3D-distribution using CFD. ► The CoD has been succesfully applied to industrial packed columns of large diameter.