Search results for "STIR"
showing 10 items of 426 documents
On vortex shape in unbaffled stirred vessels as measured by digital image analysis
2012
In this work, digital image analysis coupled with a suitable shadowgraphy-based technique is employed to investigate the shape of the free-surface vortex that forms in uncovered unbaffled tanks stirred by either a D=T/3 Lightnin A310 or a D=T/3 Rushton turbine. The technique is based on back-lighting the vessel and suitably averaging vortex images over time. Data obtained show that the two different impellers give rise to quite different vortex shapes. A novel 2-parameter model is proposed that successfully describes vortex shapes obtained with both impellers.
Free vortex shape in Uncovered Unbaffled Stirred Tanks (UUST) agitated by Rushton turbines
2012
The main feature of unbaffled stirred tanks is the highly swirling liquid motion, which leads to the formation of a central vortex on the liquid free surface, when the vessel is operated without top-cover (Uncovered Unbaffled Stirred Tanks, UUST). In this work, original data on fluid dynamics characteristics of (UUST) agitated by a Rushton turbine are presented. In particular, digital image analysis is employed to accurately assess vortex shape and validate an original model for its description. The model describes vortex shape in the case of sub-critical systems (when vortex bottom is placed above the impeller plane) as well as in the case of super-critical systems (when vortex bottom fall…
Ultimate Shear of RC Beams with Corroded Stirrups and Strengthened with FRP
2019
Transverse reinforcement plays a key role in the response behavior of reinforced concrete beams. Therefore, corrosion of steel stirrups may change the failure mode of elements from bending to shear, leading to a brittle and catastrophic crisis. It is important to strengthen reinforced concrete beams with corroded stirrups to enhance the shear resistance. This paper presents a formulation, based on the modified compression field theory, to estimate the ultimate shear of reinforced concrete beams strengthened with FRP, because of stirrup corrosion. The detrimental effect of corrosion on steel stirrup yield strength was taken into account by introducing an empirical decay law. The effective st…
Defensa legal por la Administración de Vicenta Espous, y de Llinares, contra el Real Convento de Nuestra Señora del Puig, sobre que se confirme la Se…
1747
Signat al final: "Dr. Joseph Boyl" Caplletra ornada al començament del text i [cristus] sobre el tít Sign.: A-D2 Reclams
Defensa juridica por Mosen Sebastian Chafreon ... Administrador de la Administracion de Lorenzo Geronimo Ridaura. Contra el Convento de Nra. Sra. del…
1742
Signat al final: "Dr. Joseph Boyl" Port. orlada Grav. xil. enmarcat de "S. Antonio de Padua" a la port Caplletra ornada al començament del text i altres ornaments tip Sign.: [A]2, B2, C3 Reclams
Informe legal por Mosen Sebastian Chafreon ... Administrador de la Obra pia fundada por Lorenzo Geronimo Ridaura. Contra el Convento, y religiosos de…
1737
Signat al final: "Dr. Joseph Boyl" Caplletra ornada al començament del text i [cristus] sobre el tít Sign.: A-H2, I1 Reclams
Por el Ilustrissimo Señor D. Bernardo Matheo Sanchez del Castellar ... Obispo de Tarazona con el Abad del Real Monasterio de Fitero, de la Orden de …
Sign.: A-H2
Informe en iustificacion de los procedimientos hechos por Don Ioseph Sanz, arcediano de Alzira , ... Comisario Apostolico : en la causa de privacion …
1664
Grav. xil. a port Sign.: A-I2, K3
Gozos en loor del santisimo Lignum Crucis, que se venera en el Real Monasterio de San Miguel de los Reyes, extra muros de Valencia.
El full orlat Grav. xil. enmarcat de "El Lignum Crucis q. se venera en el Rl. Monastº. de S. Miguel de los Reyes", de diferent color que la resta del full i flanquejat per gerros amb flors Text del goig a tres col. separades per filets
Gozos en loor del santissimo Lignum Crucis, que se venera en el Real Monasterio de San Miguel de los Reyes, extra-muros de la Ciudad de Valencia.
El full orlat Grav. xil. enmarcat del Lignum Crucis, flanquejat per gerros amb flors Text del goig a tres col. separades per filets