caa a22 4500 465814204 CHVBK 20180323112123.0 cr unu---uuuuu 170327e19900701xx s 000 0 eng 10.1007/BF01339887 doi (NATIONALLICENCE)springer-10.1007/BF01339887 A novel geometry for rheological characterization of viscoelastic materials [Elektronische Daten] [N. Calvo, O. Campanella] A novel geometry for generating a viscometric flow presents advantages of both cone and plate and parallel plate geometries, regarding uniform shear field and adjustable range of measurement. Kinematics and dynamics of the generated flow have been described mathematically utilizing an orthogonal curvilinear coordinate system based on the shapes of the shearing surfaces which are similar to the surface that generates the flow. Simple equations that allow the calculation of quantities of experimental interest in the rheological characterization of liquid materials, namely, shear rate, shear stress and two normal stress differences, have also been derived. The geometry, called pseudosphere, was tested with two types of fluids (Newtonian and pseudoplastic). Results show that the geometry can be used with low viscosity liquids (Newtonian liquids) by only adjusting the gapH. The behavior of pseudoplastic fluids for both low and moderately high viscosity could also be studied with this geometry. Very reproducible results were obtained when compared with those obtained with cone and plate geometry. Regions of lower shear rate could be studied using only the pseudosphere geometry. Steinkopff, 1990 R heometry nationallicence v ariable r ange nationallicence p seudosphere geometry nationallicence v iscoelasticity nationallicence Calvo N. Intec (Conicet), Santa Fe, Argentina aut Campanella O. Intec (Conicet), Santa Fe, Argentina aut Rheologica Acta Steinkopff-Verlag 29/4(1990-07-01), 323-331 0035-4511 29:4<323 1990 29 397 https://doi.org/10.1007/BF01339887 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01339887 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Calvo N. Intec (Conicet), Santa Fe, Argentina aut NATIONALLICENCE 700 1- Campanella O. Intec (Conicet), Santa Fe, Argentina aut NATIONALLICENCE 773 0- Rheologica Acta Steinkopff-Verlag 29/4(1990-07-01), 323-331 0035-4511 29:4<323 1990 29 397 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer