A previously developed phenomenol. model for the deformation of a droplet immersed in a fluid subjected to a flow field (P. L. Maffettone, M. Minale; 1998) is tested to predict the drop transient behavior following the flow start-up and its relaxation upon cessation of flow. The model was then compared with expts. in which a shear device consisting of a parallel plate app. was used, and the fluids used were 2 immiscible polymers, polyisobutylene and polydimethylsiloxane. Comparison of theor. and exptl. data showed that both the start-up and the relaxation upon cessation fo flow is accurately predicted. The study is of interest with respect to blending and processing polymers.
The deformation of an ellipsoidal drop under viscous flow conditions / Maffettone, PIER LUCA; Guido, Stefano; M., Minale. - STAMPA. - (1998), pp. 84-85. ( European Rheology Conference, 5th Portoroz, Slovenia 1998).
The deformation of an ellipsoidal drop under viscous flow conditions
MAFFETTONE, PIER LUCA;GUIDO, STEFANO;
1998
Abstract
A previously developed phenomenol. model for the deformation of a droplet immersed in a fluid subjected to a flow field (P. L. Maffettone, M. Minale; 1998) is tested to predict the drop transient behavior following the flow start-up and its relaxation upon cessation of flow. The model was then compared with expts. in which a shear device consisting of a parallel plate app. was used, and the fluids used were 2 immiscible polymers, polyisobutylene and polydimethylsiloxane. Comparison of theor. and exptl. data showed that both the start-up and the relaxation upon cessation fo flow is accurately predicted. The study is of interest with respect to blending and processing polymers.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
