Authors Lac E., Barthès-Biesel D., Pelekasis N.A., Tsamopoulos J. Abstract The dynamic response of an initially spherical capsule subject to different externally imposed flows is examined. The neo-Hookean and Skalak et al. (Biophys. J., vol. 13 (1973), pp. 245-264) constitutive laws are used for the description of the membrane mechanics, […]
2006
5 posts
Authors Dimakopoulos Y., Tsamopoulos J. Abstract We examine the displacement by pressurized air of a liquid, which only partially occupies straight or complex tubes, according to the Gas-Assisted Injection Molding (GAIM) process. The process involves the formation and continuous elongation of a gaseous finger, which sets in motion the liquid, […]
Authors Karapetsas G., Tsamopoulos J. Abstract The transient, axisymmetric squeezing of viscoplastic materials under creeping flow conditions is examined. The flow of the material even outside the disks is followed. Both cases of the disks moving with constant velocity or under constant force are studied. This time-dependent simulation of squeeze […]
Authors Foteinopoulou K., Mavrantzas V.G., Dimakopoulos Y., Tsamopoulos J. Abstract Our recent finite element-based study of the deformation of a single bubble in a Newtonian or viscoelastic filament undergoing stretching is extended here to the case of multiple bubbles simultaneously growing in the stretched medium. The filament, having initially the […]
Authors Dimakopoulos Y., Tsamopoulos J. Abstract The displacement of viscous liquids by pressurized gas from harmonically undulated tubes of finite length is examined. This unsteady process gives rise to a long open bubble of varying radius, increasing length and surrounded by the liquid. In general, the thickness of the liquid […]