Fig. 6From: Flow analysis of a set of ornamental chimney caps designed by Antoni GaudíBar plot of the parameter \(K\), defined in Eq. 2 as the ratio between the external flow velocity in the base of the chimney and the external wind velocity. The height of the colored bars corresponds to the average value of the two orientations. The black lines indicate the two values of \(K\) for the two orientations, O1 and O2, shown in Fig. 3 with arrowsBack to article page