A Novel Profiled Blade Impeller for Homogenization of Miscible Liquids in Stirred Vessels

Fentiman, N.J.; Hill, Nathan; Lee, K.C.; Paul, G. R.; Yianneskis, M.

doi:10.1205/026387698525586

Cited by 23 publications

(16 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The system was used to analyse the entire flow field in a stirred vessel as well as small areas in the discharge stream region below the impeller. The mean flow velocity and rms velocity were measured and compared with LDA measurement results found in Fentiman et al(1998), as depicted in Figure 10. In the figure, T is a dimension of the vessel, r is the radial distance from the centre of the vessel, V tip is the impeller tip speed in m/s, and and ′ are mean and rms velocity, respectively.…”

Section: Particle Image Velocimetrymentioning

confidence: 99%

“…a) Comparison of values in the plane z/T = 0.28 obtained by Fentiman et al (1998) and PIV; b) Comparison of ′ values in the plane z/T = 0.18 obtained byFentiman et al (1998) and PIV.…”

mentioning

confidence: 99%

“…A schematic of a PIV system(Johnson, et al, 2014) Two sample images with 80μm solid particles and flow tracers (top row), and 1.2 mm bubbles and flow tracers (bottom row) separated by 0.001 s and corresponding velocity field from cross correlation as perBrady et al (2006). a) Comparison of values in the plane z/T = 0.28 obtained byFentiman et al (1998) and PIV; b) Comparison of ′ values in the plane z/T = 0.18 obtained byFentiman et al (1998) and PIV.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Experimental quantification of turbulence and its applications in the study of multiphase flotation pulps

Xie¹,

Meng²,

Nguyen

2016

International Journal of Mineral Processing

View full text Add to dashboard Cite

Turbulence is common in daily activities, both naturally and industrially. However, it is not well understood on the microscopic level because there is a lack of suitable quantification techniques especially for multi-phase particulate systems such as flotation pulps. In this paper, the different quantification techniques which have been used to characterise turbulence in the literature have been reviewed in terms of their basic principles, system structure, the range of application and limitations. Optical techniques such as Laser Doppler Anemometry and Particle Image Velocimetry can produce accurate measurement results with high spatial and temporal resolution, but their applications are limited to transparent flows. Hot wire probes have high spatial and temporal resolution in turbulence quantification, but they are susceptible to environmental factors. Conductivity probe, Electrical Resistance Tomography (ERT) and Piezoelectric Sensor are techniques that can quantify turbulence in multiphase flows, but their spatial resolutions are limited. Particle Tracking Velocimetry can reveal particle trajectories in multiphase flows; it can also measure velocity fluctuation. Positron Emission Particle Tracking cannot be used to quantify turbulence although it can also be used to determine the Lagrangian trajectory of particles. For turbulence quantification in three phase flows, piezoelectric sensor, ERT and conductivity probe require further development.

show abstract

Section: Particle Image Velocimetrymentioning

confidence: 99%

“…a) Comparison of values in the plane z/T = 0.28 obtained by Fentiman et al (1998) and PIV; b) Comparison of ′ values in the plane z/T = 0.18 obtained byFentiman et al (1998) and PIV.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Experimental quantification of turbulence and its applications in the study of multiphase flotation pulps

Xie¹,

Meng²,

Nguyen

2016

International Journal of Mineral Processing

View full text Add to dashboard Cite

show abstract

“…Hitherto, some efficiencies of the impeller have been proposed to assess the power characteristics (Nienow, 1997;Fentiman et al, 1998;Wu et al, 2006;Fort, 2011). A parameter incorporating the impeller power number, N p , and discharge flow number, N d , is possibly employed.…”

Section: Impeller Efficiencies Based On the Power Consumptionmentioning

confidence: 99%

Liquid Flow in Impeller Swept Regions of Baffled and Unbaffled Vessels With a Turbine-Type Agitator

Yoshida

Ebina

Shirosaki

et al. 2015

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-Liquid flow in the impeller swept region of vessels with a turbine-type agitator was examined for the flow path between the neighboring blades of the rotating impeller. Visualization of the flow and its measurement were done using particle tracking velocimetry with a camera rotating along with the impeller. Internal liquid flow of the impeller differed when the velocity magnitudes were compared in conditions with and without baffles. Larger circumferential and radial velocities were observed without the baffles and with the baffles, respectively, which was considered to result in the difference of impeller power transmission. Efficiencies produced, based on the flow-head concept, reflected the impeller power characteristics. The turbine-type impeller as an actuator was demonstrated to improve in the flow characteristics with viscous losses increased by the baffles. In terms of impeller efficiencies based on the power consumption, the effect of baffles for the energy was as a decreased transmission and an increased transport.

show abstract

“…Further, authors will agree that the direct correlation of hydraulic efficiency (N QP /N P ) with efficient solid suspension is difficult with the present status of knowledge. The available published literature may not be sufficient to develop clear recommendations over a wide range of fluid and solid properties and geometrical details of stirred tanks (Bourne and Sharma, 1974;Chapman et al, 1983;Dohi et al, 2004;Lali et al, 1989;Musil et al, 1978;Nienow, 1968;Raghav Rao et al 1988;Rewatkar et al, 1991a;1991b;Zhu and Wu, 2002;Zweitering, 1958 (Armenante and Chou, 1996;Armenante et al, 1997;Bakker and Oshinowo, 2004;Bakker and van den Akker, 1994;Bakker et al, 1996;Bakker et al, 1997;Brucato et al, 1998;Bugay et al, 2002;Derksen, 2001;Fentiman et al, 1998;Firoz et al, 2004;Fokema et al, 1994;Harvey et al, 1995;Harvey et al, 1996;Jahoda et al, 2007;Jaworski et al, 1996;Kumaresan et al, 2005;Li et al, 2005;Mavros et al, 1998;Murthy et al, 2007;Murthy et al, 2008;Nere et al, 2001;Nurtono et al, 2009;Ranade et al, 1992;Ranade et al, 2002;Roussinove et al, 2003;Roy et al, 2010;Rutherford et al, 1996;…”

mentioning

confidence: 99%

Comments on Flow characteristics of axial high speed impellers (Chem. Process Eng., 2010, 31, 661)

Joshi¹

2012

Chemical and Process Engineering

View full text Add to dashboard Cite

Fořt et al. (2010) have written another useful article on flow characteristics generated by axial high speed impellers. I agree with the authors that the knowledge of flow patterns is crucial for developing reliable design procedures for instance, for mixing and blending (Baldyga and Bourne, 1997;Nienow, 1997;Ranade et al., 1991), for solid suspension (Raghva Rao et al., 1988; Zwietering, 1958), for gas induction (Joshi and Sharma, 1977) and bioreactions where controlled shear is important (Joshi et al., 1996). With this context, the work of Fořt et al. (2010) needs some clarification and further extension.

show abstract

A Novel Profiled Blade Impeller for Homogenization of Miscible Liquids in Stirred Vessels

Cited by 23 publications

References 21 publications

Experimental quantification of turbulence and its applications in the study of multiphase flotation pulps

Experimental quantification of turbulence and its applications in the study of multiphase flotation pulps

Liquid Flow in Impeller Swept Regions of Baffled and Unbaffled Vessels With a Turbine-Type Agitator

Comments on Flow characteristics of axial high speed impellers (Chem. Process Eng., 2010, 31, 661)

Contact Info

Product

Resources

About