RT journal article
T1 Influence of the Polarity of the Electric Field on Electrorheometry
A1 García Ortiz, José Hermenegildo
A1 Sadek, Samir H.
A1 Galindo Rosales, Francisco J.
A2 Ingeniería Mecánica y Diseño Industrial
K1 electrorheology
K1 extensional flow
K1 capillary breakup extensional electrorheometry (CaBEER)
K1 dielectric liquid bridge
AB Uniaxial extensional flow is a canonical flow typically used in rheological characterization to provide complementary information to that obtained by imposing simple shear flow. In spite of the importance of having a full rheological characterization of complex fluids, publications on the rheological characterization of mobile liquids under extensional flow have increased significantly only in the last 20 years. In the case of the rheological characterization of electrorheological fluids, the situation is even more dramatic, as the ERFs have been exclusively determined under simple shear flow, where an electrorheological cell is attached to the rotational rheometer generating an electric field perpendicular to the flow direction and that does not allow for inverting the polarity. The very recent work published by Sadek et al., who developed a new electrorheological cell to be used with the commercial Capillary Breakup Extensional Rheometer (CaBER), allows for the very first time performing electrorheometry under extensional flow. By means of the same experimental setup, this study investigates the influence of the polarity of the imposed electric field on the filament thinning process of a Newtonian and an electrorheological fluid. Results show that a polarity against the gravity results in filament thinning processes that live longer or reach a stable configuration at lower intensities of the applied electric field.
PB MDPI
SN 2076-3417
YR 2019
FD 2019-12
LK http://hdl.handle.net/10498/22757
UL http://hdl.handle.net/10498/22757
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 06-nov-2026