Application of variational principles in modeling of the film blowing process for high stalk bubbles

Recently proposed model for the film blowing process [M. Zatloukal, J. Vlcek, Modeling of the film blowing process by using variational principles, J. Non-Newton. Fluid Mech. 123 (2004) 201–213] has been generalized through assuming no constant bubble compliance and consequently used in the modeling of the high stalk tubular film blowing of the high molecular weight HDPE. It has been found that the proposed model together with standard Pearson–Petrie formulation has very good capability to describe/predict corresponding experimental data.