CC BY-NC-ND 3.0 UnportedMostafaiyan, M.Saeb, M.R.Ahmadi, Z.Khonakdar, H.A.Wagenknecht, U.Heinrich, G.2020-09-252020-09-252013https://doi.org/10.34657/4322https://oa.tib.eu/renate/handle/123456789/5693In this work, the dynamic deformation of a viscose Newtonian droplet passing through cylindrical converging dies has been studied. The changes in the interfacial area between two immiscible Newtonian fluids have been considered as a variable representing the time-dependent deformation of a circular droplet along converging dies. To do so, a surface tracking method has been incorporated into a finite element code, developed by the authors, which quantifies the deformation of the droplet through the converging path, and where the surface area of the deformed drop has been consequently chosen as a criterion for a two-phase interface. In this study, it has been revealed that by changing both rheological and geometrical parameters it is possible to manage the value of interface area between two phases. Ultimately, a unique curve is developed for each droplet to primary phase viscosity ratio which can correlate drop deformation with geometrical parameters.enghttps://creativecommons.org/licenses/by-nc-nd/3.0/620Converging diesNewtonian drop deformationNumerical studyTwophase flowDeformationDiesGeometryNewtonian liquidsPhase interfacesTwo phase flowCylindrical diesDynamic deformationFinite element codesInterfacial areasNewtonian dropsNumerical studyTime-dependent deformationTwo-phase interfacesDrop breakupArticle