Experimental correlations for the estimation of the rainout of flashing liquid releases: Revisited

In 1992, DeVaull and King used the results of field tests to derive two similarity correlations for non-volatile and volatile liquids, respectively, for the estimation of the rainout fraction x_R of flashing liquid releases. These correlations are shown to be flawed, because an incorrect value of the liquid specific heat of CFC-11 has been used to derive them. The field test data corrected in 1994 with the UDM model are used to derive a new correlation valid for non-volatile as well as volatile liquids. The new correlation is x_R=0.6(1–3x_H) where x_H is the isenthalpic flash fraction. Use of the new correlation with the public domain consequence analysis code ALOHA is outlined.